So you get the error when you press the button? Try removing data: and align scene: '4' with entity_id: above. I don’t think you need data: for a service call in a lovelace card since service_data: is already required.
With the entity-button card is it possible to have more than one service-call entry?
What i would like to have is the chance to toggle the light and also (when the light is on) to choose between scenes… I don’t think it could be possible but i try to ask…
Which can be a card to do this?
Nope, you’d need separate buttons for that. Alternatively, you could create an input_select and use those to trigger automations based on which value you select in the card.