State List
GET /online/frontend-api/state/?format=api&auth_token=
{ "global": { "oneshot_volume": 1.0, "volume": 1.0, "stopped": true } }
GET /online/frontend-api/state/?format=api&auth_token=
{ "global": { "oneshot_volume": 1.0, "volume": 1.0, "stopped": true } }