Set playlist: https://IP: Port/webapi/AudioStation/remote_player.cgi?api=SYNO.AudioStation.RemotePlayer&method=updateplaylist&library=shared&id=PLAYERID&offset=0&limit=0&play=true&version=2&containers_json=%5B%7B%22type%22%3A%22playlist%22%2C%22id%22%3A%22PLAYLISTID%22%7D%5D