App\Http\Controllers\API\PlaylistController::store PHP Метод

    public function store(PlaylistStoreRequest $request)
    {
        $playlist = auth()->user()->playlists()->create($request->only('name'));
        $playlist->songs()->sync($request->input('songs', []));
        $playlist->songs = $playlist->songs->pluck('id');
        return response()->json($playlist);
    }