Implemented the interface in all responses

refr #132

src/models/responses/ResponseTrack.ts

@@ -1,11 +1,19 @@
 import { IsInt, IsOptional, IsString } from "class-validator";
 import { TrackLapTimeCantBeNegativeError } from '../../errors/TrackErrors';
 import { Track } from '../entities/Track';
+import { ResponseObjectType } from '../enums/ResponseObjectType';
+import { IResponse } from './IResponse';
 
 /**
  * Defines the track response.
 */
-export class ResponseTrack {
+export class ResponseTrack implements IResponse {
+    /**
+    * The responseType.
+    * This contains the type of class/entity this response contains.
+    */
+    responseType: ResponseObjectType = ResponseObjectType.TRACK;
+
     /**
      * The track's id.
      */