Added Comments.

ref #11 #13

src/controllers/TrackController.ts

@@ -42,7 +42,7 @@ export class TrackController {
 		@Body({ validate: true })
 		track: CreateTrack
 	) {
-		return this.trackRepository.save(track.getTrack());
+		return this.trackRepository.save(track.toTrack());
 	}
 
 	@Put('/:id')