Horizontal stack card with scene

hi guys,
i´m trying to make a horizontal stack card for my mobile view.
on tap it should call a scene to get my window shutters in a set position. i have the scene and it´s working, however i can´t figure what i have to set in the card.

what i have right now:

type: horizontal-stack
cards:
  - entity: scene.window_nach_hause_kommen_david
    tap_action:
    action: toggle
    type: entity-button

however i can´t figure what to use as action to call the scene. could anybody help me out?

EDIT:

another way i tried to fix it:

type: horizontal-stack
cards:
  - entity: cover.fenster
    tap_action:
    action: call-service
    service: cover.set_cover_position
    data:
      entity_id: cover.fenster
      position: 50
    type: entity-button

looks like “position: 50” is wrong data, at least it gives me: required key not provided @ data[‘position’]

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oops, sry. changed. thanks for the heads up!

Try this:

type: horizontal-stack
cards:
  - entity: cover.fenster
    tap_action:
      action: call-service
      service: cover.set_cover_position
      service_data:
        entity_id: cover.fenster
        position: 50
    type: entity-button

Though from the docs it’s not clear what service data it supports.

that one worked. thanks!
what i came up with:

type: horizontal-stack
cards:
  - entity: scene.window_nach_hause_kommen_david
    tap_action:
      action: call-service
      service: cover.set_cover_position
      service_data:
        entity_id: group.all_covers
        position: 100
    type: entity-button
  - entity: scene.window_haus_verlassen_david
    tap_action:
      action: call-service
      service: cover.set_cover_position
      service_data:
        entity_id: group.all_covers
        position: 50
    type: entity-button
  - entity: scene.window_bitte_nicht_storen_david
    tap_action:
      action: call-service
      service: cover.set_cover_position
      service_data:
        entity_id: group.all_covers
        position: 0
    type: entity-button