toggle a aircondition switch

[pit2023]

hello maybe you can help me

you wrote this code for toggle a lamp:
_entities:

• entity: light.1st_floor_hall_light
  name: 'hall'
  icon: mdi:lightbulb
  tap_action:
  action: call-service
  service: light.toggle
  service_data: { "entity_id" : "light.1st_floor_hall_light" }_

but i want to toggle a switch for my aircondition:
but my code is not working:

- entity: switch.klima_wohnwagen
name: Wohnwagen
icon: mdi:air-conditioner
tap_action:
action: call-service
service: toggle
service_data:
entity_id: switch.klima_wohnwagen

the error is: toggle/undefined required key not provided@data .........

maybe you can find my mistake - thx a lot
kind regards peter