farm-2.x-dev/modules/core/data_stream/modules/notification/data_stream_notification.routing.yml

entity.data_stream_notification.enable:
  path: '/data-stream-notifications/{data_stream_notification}/enable'
  defaults:
    _controller: '\Drupal\data_stream_notification\Controller\NotificationUIController::ajaxOperation'
    op: enable
  requirements:
    _entity_access: data_stream_notification.update
    _csrf_token: 'TRUE'

entity.data_stream_notification.disable:
  path: '/data-stream-notifications/{data_stream_notification}/disable'
  defaults:
    _controller: '\Drupal\data_stream_notification\Controller\NotificationUIController::ajaxOperation'
    op: disable
  requirements:
    _entity_access: data_stream_notification.update
    _csrf_token: 'TRUE'