contacts_subscriptions-1.x-dev/contacts_subscriptions.links.action.yml

contacts_subscription.type_add:
  route_name: entity.contacts_subscription_type.add_form
  title: 'Add subscription type'
  appears_on:
    - entity.contacts_subscription_type.collection

contacts_subscription.add_page:
  route_name: entity.contacts_subscription.add_page
  title: 'Add membership'
  appears_on:
    - entity.contacts_subscription.collection