REST API - Assign Email to Program
Hi,
I have created an Email-type Program (Program Test) and a child Email (Test Email 002):

I would like to use the REST API to associate this Email with the parent Program so that it shows up as the selected Email in the Program UI:

I've tried looking through the documentation for the REST API but have been unable to find an endpoint that will allow me to perform this action. Does such an endpoint exist and if so, could you point me to the relevant documentation?