Icinga2: How to control if master or satellite notifies?

I created an apply rule for notifications within an Icinga2 global zone:

  apply Notification "mail-icingaadmin" to Service {
  import "mail-service-notification"

  user_groups = ["icingaadmins"]

  assign where host.vars.notification_type == "mail"
}

This works.

In my setup, there is a master and a satellite node, both with the notification feature enabled.

I now want to control which node sends out the notification manually without having to disable the notification feature on one of the nodes.

Is something like this possible? I tried many things (setting a zone, command_endpoint etc.), but none of them worked.