diff --git a/cvat/apps/engine/static/engine/js/cvat.js b/cvat/apps/engine/static/engine/js/cvat.js
index 3ceeba60..f1cc1321 100644
--- a/cvat/apps/engine/static/engine/js/cvat.js
+++ b/cvat/apps/engine/static/engine/js/cvat.js
@@ -1,22 +1,22 @@
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Call annotations.get() or annotations.clear(true) before")},uploadAnnotations:async function(t,n,r){const o=t instanceof window.cvat.classes.Task?"task":"job";await e.annotations.uploadAnnotations(o,t.id,n,r)},dumpAnnotations:async function(t,n,r){const o=t instanceof window.cvat.classes.Task?"task":"job";return await e.annotations.dumpAnnotations(o,t.id,n,r)}}})()},function(t,e,n){n(4),n(81),n(8),n(42),(()=>{const{RectangleShape:e,PolygonShape:r,PolylineShape:o,PointsShape:i,RectangleTrack:s,PolygonTrack:a,PolylineTrack:c,PointsTrack:u,Track:l,Shape:p,Tag:f,objectStateFactory:h}=n(151),{checkObjectType:d}=n(43),b=n(77),g=["#0066FF","#AF593E","#01A368","#FF861F","#ED0A3F","#FF3F34","#76D7EA","#8359A3","#FBE870","#C5E17A","#03BB85","#FFDF00","#8B8680","#0A6B0D","#8FD8D8","#A36F40","#F653A6","#CA3435","#FFCBA4","#FF99CC","#FA9D5A","#FFAE42","#A78B00","#788193","#514E49","#1164B4","#F4FA9F","#FED8B1","#C32148","#01796F","#E90067","#FF91A4","#404E5A","#6CDAE7","#FFC1CC","#006A93","#867200","#E2B631","#6EEB6E","#FFC800","#CC99BA","#FF007C","#BC6CAC","#DCCCD7","#EBE1C2","#A6AAAE","#B99685","#0086A7","#5E4330","#C8A2C8","#708EB3","#BC8777","#B2592D","#497E48","#6A2963","#E6335F","#00755E","#B5A895","#0048ba","#EED9C4","#C88A65","#FF6E4A","#87421F","#B2BEB5","#926F5B","#00B9FB","#6456B7","#DB5079","#C62D42","#FA9C44","#DA8A67","#FD7C6E","#93CCEA","#FCF686","#503E32","#FF5470","#9DE093","#FF7A00","#4F69C6","#A50B5E","#F0E68C","#FDFF00","#F091A9","#FFFF66","#6F9940","#FC74FD","#652DC1","#D6AEDD","#EE34D2","#BB3385","#6B3FA0","#33CC99","#FFDB00","#87FF2A","#6EEB6E","#FFC800","#CC99BA","#7A89B8","#006A93","#867200","#E2B631","#D9D6CF"];function m(t,n,s){const{type:a}=t,c=g[n%g.length];let u=null;switch(a){case"rectangle":u=new e(t,n,c,s);break;case"polygon":u=new r(t,n,c,s);break;case"polyline":u=new o(t,n,c,s);break;case"points":u=new i(t,n,c,s);break;default:throw new window.cvat.exceptions.DataError(`An unexpected type of shape "${a}"`)}return u}function v(t,e,n){if(t.shapes.length){const{type:r}=t.shapes[0],o=g[e%g.length];let i=null;switch(r){case"rectangle":i=new s(t,e,o,n);break;case"polygon":i=new a(t,e,o,n);break;case"polyline":i=new c(t,e,o,n);break;case"points":i=new u(t,e,o,n);break;default:throw new window.cvat.exceptions.DataError(`An unexpected type of track "${r}"`)}return i}return console.warn("The track without any shapes had been found. It was ignored."),null}t.exports=class{constructor(t){this.labels=t.reduce((t,e)=>(t[e.id]=e,t),{}),this.shapes={},this.tags={},this.tracks=[],this.objects={},this.count=0,this.flush=!1,this.collectionZ={},this.groups={max:0},this.injection={labels:this.labels,collectionZ:this.collectionZ,groups:this.groups}}import(t){for(const e of t.tags){const t=++this.count,n=new f(e,t,this.injection);this.tags[n.frame]=this.tags[n.frame]||[],this.tags[n.frame].push(n),this.objects[t]=n}for(const e of t.shapes){const t=++this.count,n=m(e,t,this.injection);this.shapes[n.frame]=this.shapes[n.frame]||[],this.shapes[n.frame].push(n),this.objects[t]=n}for(const e of t.tracks){const t=++this.count,n=v(e,t,this.injection);n&&(this.tracks.push(n),this.objects[t]=n)}return this}export(){return{tracks:this.tracks.filter(t=>!t.removed).map(t=>t.toJSON()),shapes:Object.values(this.shapes).reduce((t,e)=>(t.push(...e),t),[]).filter(t=>!t.removed).map(t=>t.toJSON()),tags:Object.values(this.tags).reduce((t,e)=>(t.push(...e),t),[]).filter(t=>!t.removed).map(t=>t.toJSON())}}get(t){const{tracks:e}=this,n=this.shapes[t]||[],r=this.tags[t]||[],o=e.concat(n).concat(r).filter(t=>!t.removed),i=[];for(const e of o){const n=e.get(t);if(n.outside&&!n.keyframe)continue;const r=h.call(e,t,n);i.push(r)}return i}merge(t){if(d("shapes for merge",t,null,Array),!t.length)return;const e=t.map(t=>{d("object state",t,null,window.cvat.classes.ObjectState);const e=this.objects[t.clientID];if(void 0===e)throw new window.cvat.exceptions.ArgumentError("The object has not been saved yet. Call ObjectState.save() before you can merge it");return e}),n={},{label:r,shapeType:o}=t[0],i=r.attributes.reduce((t,e)=>(t[e.id]=e,t),{});for(let s=0;s<e.length;s++){const a=e[s],c=t[s];if(c.label.id!==r.id)throw new window.cvat.exceptions.ArgumentError(`All shape labels are expected to be ${r.name}, but got ${c.label.name}`);if(c.shapeType!==o)throw new window.cvat.exceptions.ArgumentError(`All shapes are expected to be ${o}, but got ${c.shapeType}`);if(a instanceof p){if(a.frame in n&&!n[a.frame].outside)throw new window.cvat.exceptions.ArgumentError("Expected only one visible shape per frame");n[a.frame]={type:o,frame:a.frame,points:[...a.points],occluded:a.occluded,zOrder:a.zOrder,outside:!1,attributes:Object.keys(a.attributes).reduce((t,e)=>(e in i&&i[e].mutable&&t.push({spec_id:+e,value:a.attributes[e]}),t),[])},a.frame+1 in n||(n[a.frame+1]=JSON.parse(JSON.stringify(n[a.frame])),n[a.frame+1].outside=!0,n[a.frame+1].frame++)}else{if(!(a instanceof l))throw new window.cvat.exceptions.ArgumentError(`Trying to merge unknown object type: ${a.constructor.name}. `+"Only shapes and tracks are expected.");{const t={};for(const e of Object.keys(a.shapes)){const r=a.shapes[e];if(e in n&&!n[e].outside){if(r.outside)continue;throw new window.cvat.exceptions.ArgumentError("Expected only one visible shape per frame")}let i=!1;for(const e in r.attributes)e in t&&t[e]===r.attributes[e]||(i=!0,t[e]=r.attributes[e]);n[e]={type:o,frame:+e,points:[...r.points],occluded:r.occluded,outside:r.outside,zOrder:r.zOrder,attributes:i?Object.keys(t).reduce((e,n)=>(e.push({spec_id:+n,value:t[n]}),e),[]):[]}}}}}let s=!1;for(const t of Object.keys(n).sort((t,e)=>+t-+e)){if((s=s||n[t].outside)||!n[t].outside)break;delete n[t]}const a=++this.count,c=v({frame:Math.min.apply(null,Object.keys(n).map(t=>+t)),shapes:Object.values(n),group:0,label_id:r.id,attributes:Object.keys(t[0].attributes).reduce((e,n)=>(i[n].mutable||e.push({spec_id:+n,value:t[0].attributes[n]}),e),[])},a,this.injection);this.tracks.push(c),this.objects[a]=c;for(const t of e)t.removed=!0,t.resetCache()}split(t,e){d("object state",t,null,window.cvat.classes.ObjectState),d("frame",e,"integer",null);const n=this.objects[t.clientID];if(void 0===n)throw new window.cvat.exceptions.ArgumentError("The object has not been saved yet. Call annotations.put(state) before");if(t.objectType!==window.cvat.enums.ObjectType.TRACK)return;const r=Object.keys(n.shapes).sort((t,e)=>+t-+e);if(e<=+r[0])return;const o=n.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{}),i=n.toJSON(),s={type:t.shapeType,points:[...t.points],occluded:t.occluded,outside:t.outside,zOrder:0,attributes:Object.keys(t.attributes).reduce((e,n)=>(o[n].mutable||e.push({spec_id:+n,value:t.attributes[n]}),e),[]),frame:e},a={frame:i.frame,group:0,label_id:i.label_id,attributes:i.attributes,shapes:[]},c=JSON.parse(JSON.stringify(a));c.frame=e,c.shapes.push(JSON.parse(JSON.stringify(s))),i.shapes.map(t=>(delete t.id,t.frame<e?a.shapes.push(JSON.parse(JSON.stringify(t))):t.frame>e&&c.shapes.push(JSON.parse(JSON.stringify(t))),t)),a.shapes.push(s),a.shapes[a.shapes.length-1].outside=!0;let u=++this.count;const l=v(a,u,this.injection);this.tracks.push(l),this.objects[u]=l,u=++this.count;const p=v(c,u,this.injection);this.tracks.push(p),this.objects[u]=p,n.removed=!0,n.resetCache()}group(t,e){d("shapes for group",t,null,Array);const n=t.map(t=>{d("object state",t,null,window.cvat.classes.ObjectState);const e=this.objects[t.clientID];if(void 0===e)throw new window.cvat.exceptions.ArgumentError("The object has not been saved yet. Call annotations.put(state) before");return e}),r=e?0:++this.groups.max;for(const t of n)t.group=r,t.resetCache()}clear(){this.shapes={},this.tags={},this.tracks=[],this.objects={},this.count=0,this.flush=!0}statistics(){const t={},e={rectangle:{shape:0,track:0},polygon:{shape:0,track:0},polyline:{shape:0,track:0},points:{shape:0,track:0},tags:0,manually:0,interpolated:0,total:0},n=JSON.parse(JSON.stringify(e));for(const n of Object.values(this.labels)){const{name:r}=n;t[r]=JSON.parse(JSON.stringify(e))}for(const e of Object.values(this.objects)){let n=null;if(e instanceof p)n="shape";else if(e instanceof l)n="track";else{if(!(e instanceof f))throw window.cvat.exceptions.ScriptingError(`Unexpected object type: "${n}"`);n="tag"}const r=e.label.name;if("tag"===n)t[r].tags++,t[r].manually++,t[r].total++;else{const{shapeType:o}=e;if(t[r][o][n]++,"track"===n){const n=Object.keys(e.shapes).sort((t,e)=>+t-+e).map(t=>+t);let o=n[0],i=!1;for(const s of n){if(i){const e=s-o-1;t[r].interpolated+=e,t[r].total+=e}i=!e.shapes[s].outside,o=s,i&&(t[r].manually++,t[r].total++)}}else t[r].manually++,t[r].total++}}for(const e of Object.keys(t))for(const r of Object.keys(t[e]))if("object"==typeof t[e][r])for(const o of Object.keys(t[e][r]))n[r][o]+=t[e][r][o];else n[r]+=t[e][r];return new b(t,n)}put(t){d("shapes for put",t,null,Array);const e={shapes:[],tracks:[],tags:[]};function n(t,e){const n=+e,r=this.attributes[e];return d("attribute id",n,"integer",null),d("attribute value",r,"string",null),t.push({spec_id:n,value:r}),t}for(const r of t){d("object state",r,null,window.cvat.classes.ObjectState),d("state client ID",r.clientID,"undefined",null),d("state frame",r.frame,"integer",null),d("state attributes",r.attributes,null,Object),d("state label",r.label,null,window.cvat.classes.Label);const t=Object.keys(r.attributes).reduce(n.bind(r),[]),o=r.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{});if("tag"===r.objectType)e.tags.push({attributes:t,frame:r.frame,label_id:r.label.id,group:0});else{d("state occluded",r.occluded,"boolean",null),d("state points",r.points,null,Array);for(const t of r.points)d("point coordinate",t,"number",null);if(!Object.values(window.cvat.enums.ObjectShape).includes(r.shapeType))throw new window.cvat.exceptions.ArgumentError("Object shape must be one of: "+`${JSON.stringify(Object.values(window.cvat.enums.ObjectShape))}`);if("shape"===r.objectType)e.shapes.push({attributes:t,frame:r.frame,group:0,label_id:r.label.id,occluded:r.occluded,points:[...r.points],type:r.shapeType,z_order:0});else{if("track"!==r.objectType)throw new window.cvat.exceptions.ArgumentError("Object type must be one of: "+`${JSON.stringify(Object.values(window.cvat.enums.ObjectType))}`);e.tracks.push({attributes:t.filter(t=>!o[t.spec_id].mutable),frame:r.frame,group:0,label_id:r.label.id,shapes:[{attributes:t.filter(t=>o[t.spec_id].mutable),frame:r.frame,occluded:r.occluded,outside:!1,points:[...r.points],type:r.shapeType,z_order:0}]})}}}this.import(e)}select(t,e,n){d("shapes for select",t,null,Array),d("x coordinate",e,"number",null),d("y coordinate",n,"number",null);let r=null,o=null;for(const i of t){if(d("object state",i,null,window.cvat.classes.ObjectState),i.outside)continue;const t=this.objects[i.clientID];if(void 0===t)throw new window.cvat.exceptions.ArgumentError("The object has not been saved yet. Call annotations.put(state) before");const s=t.constructor.distance(i.points,e,n);null!==s&&(null===r||s<r)&&(r=s,o=i)}return{state:o,distance:r}}}})()},function(t,e,n){"use strict";var r=n(3);t.exports=function(t,e){var n=[][t];return!n||!r(function(){n.call(null,e||function(){throw 1},1)})}},function(t,e,n){n(4),n(81),n(8),(()=>{const e=n(76),{checkObjectType:r}=n(43);function o(t,n){const r=new e(n);return r.hidden={save:this.save.bind(this,t,r),delete:this.delete.bind(this),up:this.up.bind(this,t,r),down:this.down.bind(this,t,r)},r}class i{constructor(t,e,n){this.taskLabels=n.labels,this.clientID=e,this.serverID=t.id,this.group=t.group,this.label=this.taskLabels[t.label_id],this.frame=t.frame,this.removed=!1,this.lock=!1,this.attributes=t.attributes.reduce((t,e)=>(t[e.spec_id]=e.value,t),{}),this.appendDefaultAttributes(this.label),n.groups.max=Math.max(n.groups.max,this.group)}appendDefaultAttributes(t){const e=t.attributes;for(const t of e)t.id in this.attributes||(this.attributes[t.id]=t.defaultValue)}delete(t){return this.lock&&!t||(this.removed=!0),!0}}class s extends i{constructor(t,e,n,r){super(t,e,r),this.collectionZ=r.collectionZ;const o=this._getZ(this.frame);o.max=Math.max(o.max,this.zOrder||0),o.min=Math.min(o.min,this.zOrder||0),this.color=n,this.shapeType=null}_getZ(t){return this.collectionZ[t]=this.collectionZ[t]||{max:0,min:0},this.collectionZ[t]}save(){throw window.cvat.exceptions.ScriptingError("Is not implemented")}get(){throw window.cvat.exceptions.ScriptingError("Is not implemented")}toJSON(){throw window.cvat.exceptions.ScriptingError("Is not implemented")}up(t,e){const n=this._getZ(t);n.max++,e.zOrder=n.max}down(t,e){const n=this._getZ(t);n.min--,e.zOrder=n.min}}class a extends s{constructor(t,e,n,r){super(t,e,n,r),this.points=t.points,this.occluded=t.occluded,this.zOrder=t.z_order}toJSON(){return{type:this.shapeType,clientID:this.clientID,occluded:this.occluded,z_order:this.zOrder,points:[...this.points],attributes:Object.keys(this.attributes).reduce((t,e)=>(t.push({spec_id:e,value:this.attributes[e]}),t),[]),id:this.serverID,frame:this.frame,label_id:this.label.id,group:this.group}}get(t){if(t!==this.frame)throw new window.cvat.exceptions.ScriptingError("Got frame is not equal to the frame of the shape");return{objectType:window.cvat.enums.ObjectType.SHAPE,shapeType:this.shapeType,clientID:this.clientID,serverID:this.serverID,occluded:this.occluded,lock:this.lock,zOrder:this.zOrder,points:[...this.points],attributes:Object.assign({},this.attributes),label:this.label,group:this.group,color:this.color}}save(t,e){if(t!==this.frame)throw new window.cvat.exceptions.ScriptingError("Got frame is not equal to the frame of the shape");if(this.lock&&e.lock)return o.call(this,t,this.get(t));const n=this.get(t),i=e.updateFlags;if(i.label&&(r("label",e.label,null,window.cvat.classes.Label),n.label=e.label,n.attributes={},this.appendDefaultAttributes.call(n,n.label)),i.attributes){const t=n.label.attributes.map(t=>`${t.id}`);for(const r of Object.keys(e.attributes))t.includes(r)&&(n.attributes[r]=e.attributes[r])}if(i.points){r("points",e.points,null,Array),n.points=[];for(const t of e.points)r("coordinate",t,"number",null),n.points.push(t)}if(i.occluded&&(r("occluded",e.occluded,"boolean",null),n.occluded=e.occluded),i.group&&(r("group",e.group,"integer",null),n.group=e.group),i.zOrder&&(r("zOrder",e.zOrder,"integer",null),n.zOrder=e.zOrder),i.lock&&(r("lock",e.lock,"boolean",null),n.lock=e.lock),i.color){if(r("color",e.color,"string",null),/^#[0-9A-F]{6}$/i.test(e.color))throw new window.cvat.exceptions.ArgumentError(`Got invalid color value: "${e.color}"`);n.color=e.color}i.reset();for(const t of Object.keys(n))t in this&&(this[t]=n[t]);return o.call(this,t,this.get(t))}}class c extends s{constructor(t,e,n,r){super(t,e,n,r),this.shapes=t.shapes.reduce((t,e)=>{t[e.frame]={serverID:e.id,occluded:e.occluded,zOrder:e.z_order,points:e.points,outside:e.outside,attributes:e.attributes.reduce((t,e)=>(t[e.spec_id]=e.value,t),{})};const n=this._getZ(e.frame);return n.max=Math.max(n.max,e.z_order),n.min=Math.min(n.min,e.z_order),t},{}),this.cache={}}toJSON(){const t=this.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{});return{clientID:this.clientID,id:this.serverID,frame:this.frame,label_id:this.label.id,group:this.group,attributes:Object.keys(this.attributes).reduce((e,n)=>(t[n].mutable||e.push({spec_id:n,value:this.attributes[n]}),e),[]),shapes:Object.keys(this.shapes).reduce((e,n)=>(e.push({type:this.shapeType,occluded:this.shapes[n].occluded,z_order:this.shapes[n].zOrder,points:[...this.shapes[n].points],outside:this.shapes[n].outside,attributes:Object.keys(this.shapes[n].attributes).reduce((e,r)=>(t[r].mutable&&e.push({spec_id:r,value:this.shapes[n].attributes[r]}),e),[]),id:this.shapes[n].serverID,frame:+n}),e),[])}}get(t){if(!(t in this.cache)){const e=Object.assign({},this.getPosition(t),{attributes:this.getAttributes(t),label:this.label,group:this.group,objectType:window.cvat.enums.ObjectType.TRACK,shapeType:this.shapeType,clientID:this.clientID,serverID:this.serverID,lock:this.lock,color:this.color});this.cache[t]=e}return JSON.parse(JSON.stringify(this.cache[t]))}neighborsFrames(t){const e=Object.keys(this.shapes).map(t=>+t);let n=Number.MAX_SAFE_INTEGER,r=Number.MAX_SAFE_INTEGER;for(const o of e){const e=Math.abs(t-o);o<=t&&e<n?n=e:e<r&&(r=e)}return{leftFrame:n===Number.MAX_SAFE_INTEGER?null:t-n,rightFrame:r===Number.MAX_SAFE_INTEGER?null:t+r}}getAttributes(t){const e={};for(const t in this.attributes)Object.prototype.hasOwnProperty.call(this.attributes,t)&&(e[t]=this.attributes[t]);const n=Object.keys(this.shapes).sort((t,e)=>+t-+e);for(const r of n)if(r<=t){const{attributes:t}=this.shapes[r];for(const n in t)Object.prototype.hasOwnProperty.call(t,n)&&(e[n]=t[n])}return e}save(t,e){if(this.lock||e.lock)return this.lock=e.lock,o.call(this,t,this.get(t));const n=Object.assign(this.get(t));n.attributes=Object.assign(n.attributes),n.points=[...n.points];const i=e.updateFlags;let s=!1;if(i.label&&(r("label",e.label,null,window.cvat.classes.Label),n.label=e.label,n.attributes={},this.appendDefaultAttributes.call(n,n.label)),i.attributes){const t=n.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{});for(const r of Object.keys(e.attributes))r in t&&(n.attributes[r]=e.attributes[r],t[r].mutable?s=!0:this.attributes[r]=e.attributes[r])}if(i.points){r("points",e.points,null,Array),n.points=[];for(const t of e.points)r("coordinate",t,"number",null),n.points.push(t);s=!0}if(i.occluded&&(r("occluded",e.occluded,"boolean",null),n.occluded=e.occluded,s=!0),i.outside&&(r("outside",e.outside,"boolean",null),n.outside=e.outside,s=!0),i.group&&(r("group",e.group,"integer",null),n.group=e.group),i.zOrder&&(r("zOrder",e.zOrder,"integer",null),n.zOrder=e.zOrder,s=!0),i.lock&&(r("lock",e.lock,"boolean",null),n.lock=e.lock),i.color){if(r("color",e.color,"string",null),/^#[0-9A-F]{6}$/i.test(e.color))throw new window.cvat.exceptions.ArgumentError(`Got invalid color value: "${e.color}"`);n.color=e.color}for(const e of Object.keys(n))e in this&&(this[e]=n[e]),this.cache[t][e]=n[e];if(i.label)for(const t of this.shapes)t.attributes={};if(i.keyframe&&!e.keyframe){for(const e in this.cache)+e>t&&delete this.cache[t];return this.cache[t].keyframe=!1,delete this.shapes[t],i.reset(),o.call(this,t,this.get(t))}if(s||i.keyframe&&e.keyframe){for(const e in this.cache)+e>t&&delete this.cache[t];if(this.cache[t].keyframe=!0,e.keyframe=!0,this.shapes[t]={frame:t,zOrder:n.zOrder,points:n.points,outside:n.outside,occluded:n.occluded,attributes:{}},i.attributes){const n=this.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{});for(const r of Object.keys(e.attributes))r in n&&n[r].mutable&&(this.shapes[t].attributes[r]=e.attributes[r],this.shapes[t].attributes[r]=e.attributes[r])}}return i.reset(),o.call(this,t,this.get(t))}getPosition(t){const{leftFrame:e,rightFrame:n}=this.neighborsFrames(t),r=Number.isInteger(n)?this.shapes[n]:null,o=Number.isInteger(e)?this.shapes[e]:null;if(o&&e===t)return{points:[...o.points],occluded:o.occluded,outside:o.outside,zOrder:o.zOrder,keyframe:!0};if(r&&o)return Object.assign({},this.interpolatePosition(o,r,t),{keyframe:!1});if(r)return{points:[...r.points],occluded:r.occluded,outside:!0,zOrder:0,keyframe:!1};if(o)return{points:[...o.points],occluded:o.occluded,outside:o.outside,zOrder:0,keyframe:!1};throw new window.cvat.exceptions.ScriptingError(`No one neightbour frame found for the track with client ID: "${this.id}"`)}delete(t){return this.lock&&!t||(this.removed=!0,this.resetCache()),!0}resetCache(){this.cache={}}}class u extends a{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=window.cvat.enums.ObjectShape.RECTANGLE}static distance(t,e,n){const[r,o,i,s]=t;return e>=r&&e<=i&&n>=o&&n<=s?Math.min.apply(null,[e-r,n-o,i-e,s-n]):null}}class l extends a{constructor(t,e,n,r){super(t,e,n,r)}}class p extends l{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=window.cvat.enums.ObjectShape.POLYGON}static distance(t,e,n){function r(t,r,o,i){return(t-e)*(i-n)-(o-e)*(r-n)}let o=0;const i=[];for(let s=0;s<t.length;s+=2){const a=t[s],c=t[s+1],u=s+2<t.length?t[s+2]:t[0],l=s+3<t.length?t[s+3]:t[1];c<=n?l>n&&r(a,c,u,l)>0&&o++:l<n&&r(a,c,u,l)>0&&o--,(e-a)*(u-e)>=0&&(n-c)*(l-n)>=0?i.push(Math.abs((l-c)*e-(u-a)*n+u*c-l*a)/Math.sqrt(Math.pow(l-c,2)+Math.pow(u-a,2))):i.push(Math.min(Math.sqrt(Math.pow(a-e,2)+Math.pow(c-n,2)),Math.sqrt(Math.pow(u-e,2)+Math.pow(l-n,2))))}return 0!==o?Math.min.apply(null,i):null}}class f extends l{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=window.cvat.enums.ObjectShape.POLYLINE}static distance(t,e,n){const r=[];for(let o=0;o<t.length-2;o+=2){const i=t[o],s=t[o+1],a=t[o+2],c=t[o+3];(e-i)*(a-e)>=0&&(n-s)*(c-n)>=0?r.push(Math.abs((c-s)*e-(a-i)*n+a*s-c*i)/Math.sqrt(Math.pow(c-s,2)+Math.pow(a-i,2))):r.push(Math.min(Math.sqrt(Math.pow(i-e,2)+Math.pow(s-n,2)),Math.sqrt(Math.pow(a-e,2)+Math.pow(c-n,2))))}return Math.min.apply(null,r)}}class h extends l{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=window.cvat.enums.ObjectShape.POINTS}static distance(t,e,n){const r=[];for(let o=0;o<t.length;o+=2){const i=t[o],s=t[o+1];r.push(Math.sqrt(Math.pow(i-e,2)+Math.pow(s-n,2)))}return Math.min.apply(null,r)}}class d extends c{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=window.cvat.enums.ObjectShape.RECTANGLE}interpolatePosition(t,e,n){const r=(n-t.frame)/(e.frame-t.frame),o=[e.points[0]-t.points[0],e.points[1]-t.points[1],e.points[2]-t.points[2],e.points[3]-t.points[3]];return{points:[t.points[0]+o[0]*r,t.points[1]+o[1]*r,t.points[2]+o[2]*r,t.points[3]+o[3]*r],occluded:t.occluded,outside:t.outside,zOrder:t.zOrder}}}class b extends c{constructor(t,e,n,r){super(t,e,n,r)}interpolatePosition(t,e,n){function r(t){let e=Number.MAX_SAFE_INTEGER,n=Number.MAX_SAFE_INTEGER,r=Number.MIN_SAFE_INTEGER,o=Number.MIN_SAFE_INTEGER;for(let i=0;i<t.length;i+=2)t[i]<e&&(e=t[i]),t[i+1]<n&&(n=t[i+1]),t[i]>r&&(r=t[i]),t[i+1]>o&&(o=t[i+1]);return{xmin:e,ymin:n,xmax:r,ymax:o}}function o(t,e){const n=[],r=e.xmax-e.xmin,o=e.ymax-e.ymin;for(let i=0;i<t.length;i+=2)n.push((t[i]-e.xmin)/r,(t[i+1]-e.ymin)/o);return n}function i(t,e){const n=[],r=e.xmax-e.xmin,o=e.ymax-e.ymin;for(let i=0;i<t.length;i+=2)n.push(t[i]*r+e.xmin,t[i+1]*o+e.ymin);return n}function s(t){const e=[];for(let n=0;n<t.length;n+=2)e.push({x:t[n],y:t[n+1]});return e}function a(t){const e=[];for(const n of t)e.push(n.x,n.y);return e}function c(t,e){function n(t){let e=0;for(let n=1;n<t.length;n+=2){e+=Math.sqrt(Math.pow(t[n].x-t[n-1].x,2)+Math.pow(t[n].y-t[n-1].y,2))}return e||Number.MAX_SAFE_INTEGER}function r(t,e){let n=0;for(let r=1;r<t.length;r+=2){const o=Math.sqrt(Math.pow(t[r].x-t[r-1].x,2)+Math.pow(t[r].y-t[r-1].y,2));n+=Math.pow(o-e,2)}return n}const o=[],i=[],s=function(t,e){const n={};for(let r=0;r<t.length;r++){n[r]=n[r]||{};for(let o=0;o<e.length;o++){const i=t[r].x-e[o].x,s=t[r].y-e[o].y;n[r][o]=Math.sqrt(Math.pow(i,2)+Math.pow(s,2))}}return n}(t,e),a=function(t,e,n){const r={};for(const o of t)r[o]=e.concat().sort((t,e)=>n[o][t]-n[o][e]);const o={},i={};let s=0;for(;Object.values(i).length!==t.length;){for(const e of t){if(i[e])continue;const t=r[e][s],a=n[e][t];if(t in o&&o[t].distance>a){const e=o[t].value;delete o[t],delete i[e]}t in o||(o[t]={value:e,distance:a},i[e]=!0)}s++}const a={};for(const t of Object.keys(o))a[o[t].value]={value:t,distance:o[t].distance};return a}(Array.from(t.keys()),Array.from(e.keys()),s),c=(n(e)+n(t))/(e.length+t.length);!function(t,e){for(const n of Object.keys(t))t[n].distance>e&&delete t[n]}(a,c+3*Math.sqrt((r(t,c)+r(e,c))/(t.length+e.length)));for(const t of Object.keys(a))a[t]=a[t].value;const u=this.appendMapping(a,t,e);for(const n of u)o.push(t[n]),i.push(e[a[n]]);return[o,i]}let u=r(t.points),l=r(e.points);(u.xmax-u.xmin<1||l.ymax-l.ymin<1)&&(l=u={xmin:0,xmax:1024,ymin:0,ymax:768});const p=s(o(t.points,u)),f=s(o(e.points,l));let h=[],d=[];if(p.length>f.length){const[t,e]=c.call(this,f,p);h=e,d=t}else{const[t,e]=c.call(this,p,f);h=t,d=e}const b=i(a(h),u),g=i(a(d),l),m=(n-t.frame)/(e.frame-t.frame),v=[];for(let t=0;t<b.length;t++)v.push(b[t]+(g[t]-b[t])*m);return{points:v,occluded:t.occluded,outside:t.outside,zOrder:t.zOrder}}appendMapping(t,e,n){const r=Object.values(t).map(t=>+t),o=Object.keys(t).map(t=>+t),i=[];function s(t){let e=t,o=t;if(!r.length)throw window.cvat.exceptions.ScriptingError("Interpolation mapping is empty");for(;!r.includes(e);)--e<0&&(e=n.length-1);for(;!r.includes(o);)++o>=n.length&&(o=0);return[e,o]}function a(t,e,r){const o=[];for(;e!==r;)o.push(n[e]),++e>=n.length&&(e=0);o.push(n[r]);let i=0,s=0,a=!1;for(let e=1;e<o.length;e++){const r=o[e],c=o[e-1],u=Math.sqrt(Math.pow(r.x-c.x,2)+Math.pow(r.y-c.y,2));a||(s+=u),i+=u,n[t]===o[e]&&(a=!0)}return i?s/i:0}for(let c=0;c<n.length;c++){const u=r.indexOf(c);if(-1===u){const[r,o]=s(c),u=a(c,r,o),l=n[r],p=n[o],f={x:l.x+(p.x-l.x)*u,y:l.y+(p.y-l.y)*u};e.push(f),t[e.length-1]=c,i.push(e.length-1)}else i.push(o[u])}return i}}class g extends b{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=window.cvat.enums.ObjectShape.POLYGON}}class m extends b{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=window.cvat.enums.ObjectShape.POLYLINE}}class v extends b{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=window.cvat.enums.ObjectShape.POINTS}}d.distance=u.distance,g.distance=p.distance,m.distance=f.distance,v.distance=h.distance,t.exports={RectangleShape:u,PolygonShape:p,PolylineShape:f,PointsShape:h,RectangleTrack:d,PolygonTrack:g,PolylineTrack:m,PointsTrack:v,Track:c,Shape:a,Tag:class extends i{constructor(t,e,n){super(t,e,n)}toJSON(){return{clientID:this.clientID,id:this.serverID,frame:this.frame,label_id:this.label.id,group:this.group,attributes:Object.keys(this.attributes).reduce((t,e)=>(t.push({spec_id:e,value:this.attributes[e]}),t),[])}}get(t){if(t!==this.frame)throw new window.cvat.exceptions.ScriptingError("Got frame is not equal to the frame of the shape");return{objectType:window.cvat.enums.ObjectType.TAG,clientID:this.clientID,serverID:this.serverID,lock:this.lock,attributes:Object.assign({},this.attributes),label:this.label,group:this.group}}save(t,e){if(t!==this.frame)throw new window.cvat.exceptions.ScriptingError("Got frame is not equal to the frame of the shape");if(this.lock&&e.lock)return o.call(this,t,this.get(t));const n=this.get(t),i=e.updateFlags;if(i.label&&(r("label",e.label,null,window.cvat.classes.Label),n.label=e.label,n.attributes={},this.appendDefaultAttributes.call(n,n.label)),i.attributes){const t=n.label.attributes.map(t=>`${t.id}`);for(const r of Object.keys(e.attributes))t.includes(r)&&(n.attributes[r]=e.attributes[r])}i.group&&(r("group",e.group,"integer",null),n.group=e.group),i.lock&&(r("lock",e.lock,"boolean",null),n.lock=e.lock),i.reset();for(const t of Object.keys(n))t in this&&(this[t]=n[t]);return o.call(this,t,this.get(t))}},objectStateFactory:o}})()},function(t,e,n){n(4),n(7),n(8),(()=>{const e=n(17);t.exports=class{constructor(t,e,n){this.sessionType=n instanceof window.cvat.classes.Task?"task":"job",this.id=n.id,this.version=t,this.collection=e,this.initialObjects=[],this.hash=this._getHash();const r=this.collection.export();for(const t of r.shapes)this.initialObjects[t.id]=t;for(const t of r.tracks)this.initialObjects[t.id]=t;for(const t of r.tags)this.initialObjects[t.id]=t}_getHash(){const t=this.collection.export();return JSON.stringify(t)}async _request(t,n){return await e.annotations.updateAnnotations(this.sessionType,this.id,t,n)}async _put(t){return await this._request(t,"put")}async _create(t){return await this._request(t,"create")}async _update(t){return await this._request(t,"update")}async _delete(t){return await this._request(t,"delete")}_split(t){const e={created:{shapes:[],tracks:[],tags:[]},updated:{shapes:[],tracks:[],tags:[]},deleted:{shapes:[],tracks:[],tags:[]}};for(const n of Object.keys(t))for(const r of t[n])if(r.id in this.initialObjects)JSON.stringify(r)!==JSON.stringify(this.initialObjects[r.id])&&e.updated[n].push(r);else{if(void 0!==r.id)throw window.cvat.exceptions.ScriptingError(`Id of object is defined "${r.id}"`+"but it absents in initial state");e.created[n].push(r)}const n=t.tracks.concat(t.shapes).concat(t.tags).map(t=>t.id);for(const t of Object.keys(this.initialObjects))if(!n.includes(+t)){const n=this.initialObjects[t];let r=null;r="shapes"in n?"tracks":"points"in n?"shapes":"tags",e.deleted[r].push(n)}return e}_updateCreatedObjects(t,e){const n=t.tracks.length+t.shapes.length+t.tags.length,r=e.tracks.length+e.shapes.length+e.tags.length;if(r!==n)throw window.cvat.exception.ScriptingError("Number of indexes is differed by number of saved objects"+`${r} vs ${n}`);for(const n of Object.keys(e))for(let r=0;r<e[n].length;r++){const o=e[n][r];this.collection.objects[o].serverID=t[n][r].id,"tracks"===n&&this.collection.objects[o].resetCache()}}_receiveIndexes(t){const e={tracks:t.tracks.map(t=>t.clientID),shapes:t.shapes.map(t=>t.clientID),tags:t.tags.map(t=>t.clientID)};return t.tracks.concat(t.shapes).concat(t.tags).map(t=>(delete t.clientID,t)),e}async save(t){"function"!=typeof t&&(t=(t=>{console.log(t)}));try{const e=this.collection.export(),{flush:n}=this.collection;if(n){t("New objects are being saved..");const n=this._receiveIndexes(e),r=await this._put(Object.assign({},e,{version:this.version}));this.version=r.version,this.collection.flush=!1,t("Saved objects are being updated in the client"),this._updateCreatedObjects(r,n),t("Initial state is being updated");for(const t of r.shapes.concat(r.tracks).concat(r.tags))this.initialObjects[t.id]=t}else{const{created:n,updated:r,deleted:o}=this._split(e);t("New objects are being saved..");const i=this._receiveIndexes(n),s=await this._create(Object.assign({},n,{version:this.version}));this.version=s.version,t("Saved objects are being updated in the client"),this._updateCreatedObjects(s,i),t("Initial state is being updated");for(const t of s.shapes.concat(s.tracks).concat(s.tags))this.initialObjects[t.id]=t;t("Changed objects are being saved.."),this._receiveIndexes(r);const a=await this._update(Object.assign({},r,{version:this.version}));this.version=s.version,t("Initial state is being updated");for(const t of a.shapes.concat(a.tracks).concat(a.tags))this.initialObjects[t.id]=t;t("Changed objects are being saved.."),this._receiveIndexes(o);const c=await this._delete(Object.assign({},o,{version:this.version}));this._version=c.version,t("Initial state is being updated");for(const t of c.shapes.concat(c.tracks).concat(c.tags))delete this.initialObjects[t.id]}this.hash=this._getHash(),t("Saving is done")}catch(e){throw t(`Can not save annotations: ${e.message}`),e}}hasUnsavedChanges(){return this._getHash()!==this.hash}}})()},function(t,e,n){n(4),n(8),n(42),(()=>{t.exports={Attribute:class{constructor(t){const e={id:void 0,default_value:void 0,input_type:void 0,mutable:void 0,name:void 0,values:void 0};for(const n in e)Object.prototype.hasOwnProperty.call(e,n)&&Object.prototype.hasOwnProperty.call(t,n)&&(Array.isArray(t[n])?e[n]=[...t[n]]:e[n]=t[n]);if(!Object.values(window.cvat.enums.AttributeType).includes(e.input_type))throw new window.cvat.exceptions.ArgumentError(`Got invalid attribute type ${e.input_type}`);Object.defineProperties(this,Object.freeze({id:{get:()=>e.id},defaultValue:{get:()=>e.default_value},inputType:{get:()=>e.input_type},mutable:{get:()=>e.mutable},name:{get:()=>e.name},values:{get:()=>[...e.values]}}))}toJSON(){const t={name:this.name,mutable:this.mutable,input_type:this.inputType,default_value:this.defaultValue,values:this.values};return void 0!==this.id&&(t.id=this.id),t}},Label:class{constructor(t){const e={id:void 0,name:void 0};for(const n in e)Object.prototype.hasOwnProperty.call(e,n)&&Object.prototype.hasOwnProperty.call(t,n)&&(e[n]=t[n]);if(e.attributes=[],Object.prototype.hasOwnProperty.call(t,"attributes")&&Array.isArray(t.attributes))for(const n of t.attributes)e.attributes.push(new window.cvat.classes.Attribute(n));Object.defineProperties(this,Object.freeze({id:{get:()=>e.id},name:{get:()=>e.name},attributes:{get:()=>[...e.attributes]}}))}toJSON(){const t={name:this.name,attributes:[...this.attributes.map(t=>t.toJSON())]};return void 0!==this.id&&(t.id=this.id),t}}}})()},function(t,e){(()=>{const e=Object.freeze({DIR:"DIR",REG:"REG"}),n=Object.freeze({ANNOTATION:"annotation",VALIDATION:"validation",COMPLETED:"completed"}),r=Object.freeze({ANNOTATION:"annotation",INTERPOLATION:"interpolation"}),o=Object.freeze({CHECKBOX:"checkbox",RADIO:"radio",SELECT:"select",NUMBER:"number",TEXT:"text"}),i=Object.freeze({TAG:"tag",SHAPE:"shape",TRACK:"track"}),s=Object.freeze({RECTANGLE:"rectangle",POLYGON:"polygon",POLYLINE:"polyline",POINTS:"points"}),a=Object.freeze({frameDownloaded:0});t.exports={ShareFileType:e,TaskStatus:n,TaskMode:r,AttributeType:o,ObjectType:i,ObjectShape:s,LogType:{pasteObject:0,changeAttribute:1,dragObject:2,deleteObject:3,pressShortcut:4,resizeObject:5,sendLogs:6,saveJob:7,jumpFrame:8,drawObject:9,changeLabel:10,sendTaskInfo:11,loadJob:12,moveImage:13,zoomImage:14,lockObject:15,mergeObjects:16,copyObject:17,propagateObject:18,undoAction:19,redoAction:20,sendUserActivity:21,sendException:22,changeFrame:23,debugInfo:24,fitImage:25,rotateImage:26},EventType:a}})()},function(t){t.exports={name:"cvat.js",version:"1.0.0",description:"Part of Computer Vision Tool which presents an interface for client-side integration",main:"babel.config.js",scripts:{build:"webpack",test:"jest --config=jest.config.js",docs:"jsdoc --readme README.md src/*.js -p -c jsdoc.config.js -d docs"},author:"Intel",license:"MIT",devDependencies:{"@babel/cli":"^7.4.4","@babel/core":"^7.4.4","@babel/preset-env":"^7.4.4","babel-eslint":"^10.0.1","babel-loader":"^8.0.6","core-js":"^3.0.1",jest:"^24.8.0","jest-junit":"^6.4.0",jsdoc:"^3.6.2",webpack:"^4.31.0","webpack-cli":"^3.3.2"},dependencies:{axios:"^0.18.0","browser-env":"^3.2.6","error-stack-parser":"^2.0.2","jest-config":"^24.8.0","js-cookie":"^2.2.0",platform:"^1.3.5","stacktrace-gps":"^3.0.2"}}},function(t,e,n){n(4),n(7),n(8),n(79),(()=>{const e=n(23),r=n(17),{isBoolean:o,isInteger:i,isEnum:s,isString:a,checkFilter:c}=n(43);t.exports=function(t){return t.plugins.list.implementation=e.list,t.plugins.register.implementation=e.register,t.server.about.implementation=(async()=>await r.server.about()),t.server.share.implementation=(async t=>await r.server.share(t)),t.server.login.implementation=(async(t,e)=>{await r.server.login(t,e)}),t.server.logout.implementation=(async()=>{await r.server.logout()}),t.users.get.implementation=(async t=>{c(t,{self:o});let e=null;return e=(e="self"in t&&t.self?[e=await r.users.getSelf()]:await r.users.getUsers()).map(t=>new window.cvat.classes.User(t))}),t.jobs.get.implementation=(async t=>{if(c(t,{taskID:i,jobID:i}),"taskID"in t&&"jobID"in t)throw new window.cvat.exceptions.ArgumentError('Only one of fields "taskID" and "jobID" allowed simultaneously');if(!Object.keys(t).length)throw new window.cvat.exceptions.ArgumentError("Job filter must not be empty");let e=null;if("taskID"in t)e=await r.tasks.getTasks(`id=${t.taskID}`);else{const n=await r.jobs.getJob(t.jobID);void 0!==n.task_id&&(e=await r.tasks.getTasks(`id=${n.task_id}`))}if(null!==e&&e.length){const n=new window.cvat.classes.Task(e[0]);return t.jobID?n.jobs.filter(e=>e.id===t.jobID):n.jobs}return[]}),t.tasks.get.implementation=(async t=>{if(c(t,{page:i,name:a,id:i,owner:a,assignee:a,search:a,status:s.bind(window.cvat.enums.TaskStatus),mode:s.bind(window.cvat.enums.TaskMode)}),"search"in t&&Object.keys(t).length>1&&!("page"in t&&2===Object.keys(t).length))throw new window.cvat.exceptions.ArgumentError('Do not use the filter field "search" with others');if("id"in t&&Object.keys(t).length>1&&!("page"in t&&2===Object.keys(t).length))throw new window.cvat.exceptions.ArgumentError('Do not use the filter field "id" with others');const e=new URLSearchParams;for(const n of["name","owner","assignee","search","status","mode","id","page"])Object.prototype.hasOwnProperty.call(t,n)&&e.set(n,t[n]);const n=await r.tasks.getTasks(e.toString()),o=n.map(t=>new window.cvat.classes.Task(t));return o.count=n.count,o}),t}})()}]);
+//# sourceMappingURL=cvat.js.map
\ No newline at end of file
diff --git a/cvatjs/src/annotations-collection.js b/cvatjs/src/annotations-collection.js
index e39757b6..6b0ecce3 100644
--- a/cvatjs/src/annotations-collection.js
+++ b/cvatjs/src/annotations-collection.js
@@ -582,10 +582,106 @@
             return new Statistics(labels, total);
         }
 
-        put() {
-            throw new window.cvat.exceptions.ScriptingError(
-                'Is not implemented',
-            );
+        put(objectStates) {
+            checkObjectType('shapes for put', objectStates, null, Array);
+            const constructed = {
+                shapes: [],
+                tracks: [],
+                tags: [],
+            };
+
+            function convertAttributes(accumulator, attrID) {
+                const specID = +attrID;
+                const value = this.attributes[attrID];
+
+                checkObjectType('attribute id', specID, 'integer', null);
+                checkObjectType('attribute value', value, 'string', null);
+
+                accumulator.push({
+                    spec_id: specID,
+                    value,
+                });
+
+                return accumulator;
+            }
+
+            for (const state of objectStates) {
+                checkObjectType('object state', state, null, window.cvat.classes.ObjectState);
+                checkObjectType('state client ID', state.clientID, 'undefined', null);
+                checkObjectType('state frame', state.frame, 'integer', null);
+                checkObjectType('state attributes', state.attributes, null, Object);
+                checkObjectType('state label', state.label, null, window.cvat.classes.Label);
+
+                const attributes = Object.keys(state.attributes)
+                    .reduce(convertAttributes.bind(state), []);
+                const labelAttributes = state.label.attributes.reduce((accumulator, attribute) => {
+                    accumulator[attribute.id] = attribute;
+                    return accumulator;
+                }, {});
+
+                // Construct whole objects from states
+                if (state.objectType === 'tag') {
+                    constructed.tags.push({
+                        attributes,
+                        frame: state.frame,
+                        label_id: state.label.id,
+                        group: 0,
+                    });
+                } else {
+                    checkObjectType('state occluded', state.occluded, 'boolean', null);
+                    checkObjectType('state points', state.points, null, Array);
+
+                    for (const coord of state.points) {
+                        checkObjectType('point coordinate', coord, 'number', null);
+                    }
+
+                    if (!Object.values(window.cvat.enums.ObjectShape).includes(state.shapeType)) {
+                        throw new window.cvat.exceptions.ArgumentError(
+                            'Object shape must be one of: '
+                                + `${JSON.stringify(Object.values(window.cvat.enums.ObjectShape))}`,
+                        );
+                    }
+
+                    if (state.objectType === 'shape') {
+                        constructed.shapes.push({
+                            attributes,
+                            frame: state.frame,
+                            group: 0,
+                            label_id: state.label.id,
+                            occluded: state.occluded,
+                            points: [...state.points],
+                            type: state.shapeType,
+                            z_order: 0,
+                        });
+                    } else if (state.objectType === 'track') {
+                        constructed.tracks.push({
+                            attributes: attributes
+                                .filter(attr => !labelAttributes[attr.spec_id].mutable),
+                            frame: state.frame,
+                            group: 0,
+                            label_id: state.label.id,
+                            shapes: [{
+                                attributes: attributes
+                                    .filter(attr => labelAttributes[attr.spec_id].mutable),
+                                frame: state.frame,
+                                occluded: state.occluded,
+                                outside: false,
+                                points: [...state.points],
+                                type: state.shapeType,
+                                z_order: 0,
+                            }],
+                        });
+                    } else {
+                        throw new window.cvat.exceptions.ArgumentError(
+                            'Object type must be one of: '
+                                + `${JSON.stringify(Object.values(window.cvat.enums.ObjectType))}`,
+                        );
+                    }
+                }
+            }
+
+            // Add constructed objects to a collection
+            this.import(constructed);
         }
 
         select(objectStates, x, y) {
diff --git a/cvatjs/src/annotations.js b/cvatjs/src/annotations.js
index 805d1c1a..61f330f6 100644
--- a/cvatjs/src/annotations.js
+++ b/cvatjs/src/annotations.js
@@ -168,6 +168,18 @@
         );
     }
 
+    async function uploadAnnotations(session, file, format) {
+        const sessionType = session instanceof window.cvat.classes.Task ? 'task' : 'job';
+        await serverProxy.annotations.uploadAnnotations(sessionType, session.id, file, format);
+    }
+
+    async function dumpAnnotations(session, name, format) {
+        const sessionType = session instanceof window.cvat.classes.Task ? 'task' : 'job';
+        const result = await serverProxy.annotations
+            .dumpAnnotations(sessionType, session.id, name, format);
+        return result;
+    }
+
     module.exports = {
         getAnnotations,
         putAnnotations,
@@ -179,5 +191,7 @@
         clearAnnotations,
         annotationsStatistics,
         selectObject,
+        uploadAnnotations,
+        dumpAnnotations,
     };
 })();
diff --git a/cvatjs/src/object-state.js b/cvatjs/src/object-state.js
index 203874b0..75672694 100644
--- a/cvatjs/src/object-state.js
+++ b/cvatjs/src/object-state.js
@@ -18,7 +18,7 @@
         /**
             * @param {Object} serialized - is an dictionary which contains
             * initial information about an ObjectState;
-            * Necessary fields: type, shape
+            * Necessary fields: objectType, shapeType
             * Necessary fields for objects which haven't been added to collection yet: frame
             * Optional fields: points, group, zOrder, outside, occluded,
             * attributes, lock, label, mode, color, keyframe, clientID, serverID
diff --git a/cvatjs/src/server-proxy.js b/cvatjs/src/server-proxy.js
index 7b7238f8..a574c434 100644
--- a/cvatjs/src/server-proxy.js
+++ b/cvatjs/src/server-proxy.js
@@ -512,6 +512,75 @@
                 return response.data;
             }
 
+            // Session is 'task' or 'job'
+            async function uploadAnnotations(session, id, file, format) {
+                const { backendAPI } = window.cvat.config;
+
+                let annotationData = new FormData();
+                annotationData.append('annotation_file', file);
+
+                return new Promise((resolve, reject) => {
+                    async function request() {
+                        try {
+                            const response = await Axios
+                                .post(`${backendAPI}/${session}s/${id}/annotations?upload_format=${format}`, annotationData, {
+                                    proxy: window.cvat.config.proxy,
+                                });
+                            if (response.status === 202) {
+                                annotationData = new FormData();
+                                setTimeout(request, 3000);
+                            } else {
+                                resolve();
+                            }
+                        } catch (errorData) {
+                            const code = errorData.response
+                                ? errorData.response.status : errorData.code;
+                            const error = new window.cvat.exceptions.ServerError(
+                                `Could not upload annotations for the ${session} ${id}`,
+                                code,
+                            );
+                            reject(error);
+                        }
+                    }
+
+                    setTimeout(request);
+                });
+            }
+
+            // Session is 'task' or 'job'
+            async function dumpAnnotations(id, name, format) {
+                const { backendAPI } = window.cvat.config;
+                const filename = name.replace(/\//g, '_');
+                let url = `${backendAPI}/tasks/${id}/annotations/${filename}?dump_format=${format}`;
+
+                return new Promise((resolve, reject) => {
+                    async function request() {
+                        try {
+                            const response = await Axios
+                                .get(`${url}`, {
+                                    proxy: window.cvat.config.proxy,
+                                });
+                            if (response.status === 202) {
+                                setTimeout(request, 3000);
+                            } else {
+                                url = `${url}&action=download`;
+                                resolve(url);
+                            }
+                        } catch (errorData) {
+                            const code = errorData.response
+                                ? errorData.response.status : errorData.code;
+                            const error = new window.cvat.exceptions.ServerError(
+                                `Could not dump annotations for the task ${id} from the server`,
+                                code,
+                            );
+                            reject(error);
+                        }
+                    }
+
+                    setTimeout(request);
+                });
+            }
+
             // Set csrftoken header from browser cookies if it exists
             // NodeJS env returns 'undefined'
             // So in NodeJS we need login after each run
@@ -570,6 +639,8 @@
                     value: Object.freeze({
                         updateAnnotations,
                         getAnnotations,
+                        dumpAnnotations,
+                        uploadAnnotations,
                     }),
                     writable: false,
                 },
diff --git a/cvatjs/src/session.js b/cvatjs/src/session.js
index c9e1e75e..2ce6380e 100644
--- a/cvatjs/src/session.js
+++ b/cvatjs/src/session.js
@@ -22,15 +22,17 @@
         clearAnnotations,
         selectObject,
         annotationsStatistics,
+        uploadAnnotations,
+        dumpAnnotations,
     } = require('./annotations');
 
     function buildDublicatedAPI(prototype) {
         Object.defineProperties(prototype, {
             annotations: Object.freeze({
                 value: {
-                    async upload(file) {
+                    async upload(file, format) {
                         const result = await PluginRegistry
-                            .apiWrapper.call(this, prototype.annotations.upload, file);
+                            .apiWrapper.call(this, prototype.annotations.upload, file, format);
                         return result;
                     },
 
@@ -46,9 +48,9 @@
                         return result;
                     },
 
-                    async dump() {
+                    async dump(name, format) {
                         const result = await PluginRegistry
-                            .apiWrapper.call(this, prototype.annotations.dump);
+                            .apiWrapper.call(this, prototype.annotations.dump, name, format);
                         return result;
                     },
 
@@ -188,9 +190,11 @@
             */
             /**
                 * Upload annotations from a dump file
+                * You need upload annotations from a server again after successful executing
                 * @method upload
                 * @memberof Session.annotations
-                * @param {File} [annotations] - text file with annotations
+                * @param {File} annotations - a text file with annotations
+                * @param {string} format - a format of the file
                 * @instance
                 * @async
                 * @throws {module:API.cvat.exceptions.PluginError}
@@ -230,6 +234,8 @@
                 * Method always dumps annotations for a whole task.
                 * @method dump
                 * @memberof Session.annotations
+                * @param {string} name - a name of a file with annotations
+                * @param {string} format - a format of the file
                 * @returns {string} URL which can be used in order to get a dump file
                 * @throws {module:API.cvat.exceptions.PluginError}
                 * @throws {module:API.cvat.exceptions.ServerError}
@@ -237,8 +243,7 @@
                 * @async
             */
             /**
-                * Collect some statistics from a session.
-                * For example number of shapes, tracks, polygons etc
+                * Collect short statistics about a task or a job.
                 * @method statistics
                 * @memberof Session.annotations
                 * @returns {module:API.cvat.classes.Statistics} statistics object
@@ -248,6 +253,7 @@
             */
             /**
                 * Create new objects from one-frame states
+                * After successful adding you need to update object states on a frame
                 * @method put
                 * @memberof Session.annotations
                 * @param {module:API.cvat.classes.ObjectState[]} data
@@ -604,10 +610,12 @@
                 get: Object.getPrototypeOf(this).annotations.get.bind(this),
                 put: Object.getPrototypeOf(this).annotations.put.bind(this),
                 save: Object.getPrototypeOf(this).annotations.save.bind(this),
+                dump: Object.getPrototypeOf(this).annotations.dump.bind(this),
                 merge: Object.getPrototypeOf(this).annotations.merge.bind(this),
                 split: Object.getPrototypeOf(this).annotations.split.bind(this),
                 group: Object.getPrototypeOf(this).annotations.group.bind(this),
                 clear: Object.getPrototypeOf(this).annotations.clear.bind(this),
+                upload: Object.getPrototypeOf(this).annotations.upload.bind(this),
                 select: Object.getPrototypeOf(this).annotations.select.bind(this),
                 statistics: Object.getPrototypeOf(this).annotations.statistics.bind(this),
                 hasUnsavedChanges: Object.getPrototypeOf(this)
@@ -730,6 +738,16 @@
         return result;
     };
 
+    Job.prototype.annotations.upload.implementation = async function (file, format) {
+        const result = await uploadAnnotations(this, file, format);
+        return result;
+    };
+
+    Job.prototype.annotations.dump.implementation = async function (name, format) {
+        const result = await dumpAnnotations(this, name, format);
+        return result;
+    };
+
     /**
         * Class representing a task
         * @memberof module:API.cvat.classes
@@ -1138,10 +1156,12 @@
                 get: Object.getPrototypeOf(this).annotations.get.bind(this),
                 put: Object.getPrototypeOf(this).annotations.put.bind(this),
                 save: Object.getPrototypeOf(this).annotations.save.bind(this),
+                dump: Object.getPrototypeOf(this).annotations.dump.bind(this),
                 merge: Object.getPrototypeOf(this).annotations.merge.bind(this),
                 split: Object.getPrototypeOf(this).annotations.split.bind(this),
                 group: Object.getPrototypeOf(this).annotations.group.bind(this),
                 clear: Object.getPrototypeOf(this).annotations.clear.bind(this),
+                upload: Object.getPrototypeOf(this).annotations.upload.bind(this),
                 select: Object.getPrototypeOf(this).annotations.select.bind(this),
                 statistics: Object.getPrototypeOf(this).annotations.statistics.bind(this),
                 hasUnsavedChanges: Object.getPrototypeOf(this)
@@ -1229,7 +1249,7 @@
         const taskFiles = {
             client_files: this.clientFiles,
             server_files: this.serverFiles,
-            remote_files: [], // hasn't been supported yet
+            remote_files: this.remoteFiles,
         };
 
         const task = await serverProxy.tasks.createTask(taskData, taskFiles, onUpdate);
@@ -1315,6 +1335,16 @@
         return result;
     };
 
+    Task.prototype.annotations.upload.implementation = async function (file, format) {
+        const result = await uploadAnnotations(this, file, format);
+        return result;
+    };
+
+    Task.prototype.annotations.dump.implementation = async function (name, format) {
+        const result = await dumpAnnotations(this, name, format);
+        return result;
+    };
+
     module.exports = {
         Job,
         Task,