Community Post to Slack Webhook- Need Help

Good Day, 
I am attempting to create a Zendesk Community Post Published event trigger that will then send a slack message to a private channel. 
I have it working when I am testing the payload, however there is no way to save the payload that I want to send. As well, there seems to be no way to create a trigger from a community post publish event. 
It seems that the Zendesk Events Webhook, cannot then send data externally, however the Trigger/Automation webhook doesnt have access to community post events. 
 

I understand that triggers might only be used for tickets, and that kinda makes sense. However how am I to be able to do this, if I cannot use triggers? Please help!