Can i POST a trigger using Orchestrator API activity?

if so how would I go about setting the properties?

Yes check the example from here and adapt based on your requirements: Orchestrator trigger run - #4 by marian.platonov

when i type the payload from that link in , i get an error.

do you have an example of one been created?
Thank you

First try in Postman or Swagger, and then play in Studio.

do you know why there is a compiler error when I copy the code? into the payload

Yes, the body is not correct.

Check this solution and readapt based on your case Making web API call, Method not found - #7 by marian.platonov

can I post the correct body so I can work with that one, please? would be very much appirated