Dialmycalls app jobs

Hello, I need help integrating a webhook or using Zapier Developer platform to integrate a zap w/ Formsite directly with a webhook in Zapier and the endpoint DialMyCalls. The documentation for the endpoint can be found here: i need a list for the contacts and the push to talk, within the Create Call POST. I'm trying to create a zap that when someone fills out a form using my form on "formsite", then it calls a web hook to create a call with the push to talk feature. I've already created zaps that get the callerid_id and recording_id, but I keep getting a server error and I believe it is due to the incomplete post.