Is it possible to send this message as an ordinary string?
{
"name": "Playlists",
"id": "kodi-1-playlist",
"class": "MqttButtons",
"buttons": [
{
"id": "kodi1-playlist1",
"text": "Playlist 1",
"topic": "kodi/command/play",
"message": "{"jsonrpc":"2.0","id":1,"method":"Player.Open","params":{"item":{"playlistid":1},"options":{"repeat":"all"}}}"
}
]
}