How to trigger a HASS service node

I have Node Red set up on my Hassio and everything is working fine. However, I can’t seem to figure out what message payload to send to a service node to trigger it. I understand the idea of message payloads but what does the node expect??

click on the node ‘current state’. On the right hand side of the screen, click on ‘Info’ tab. It will tell you what it expects.

use the ‘Services’ page on your home assistant to get the context.