organizer-1.0.x-dev/organizer.links.action.yml

organizer.type_add:
  title: 'Add organizer type'
  route_name: entity.organizer_type.add_form
  appears_on:
    - entity.organizer_type.collection

organizer.add_page:
  title: 'Add organizer'
  route_name: entity.organizer.add_page
  appears_on:
    - entity.organizer.collection