Cannot activate scene

[matteobrusa]

I'm trying to call the scene.turn_on service.
The service data field contains {"entity_id":"scene.away"} which is a valid JSON.
However, when pressing test service i get the toast "Data should be valid JSON."

What am i doing wrong?

[bmaehr]

Perhaps a space or line feed after the JSON. Or the missing space after the :

The implementation is complaining about to many stupid things.