Add JSON payload option to workflows as well as HTTP POST

[tolkienosborn]

Describe your idea

Add a submit to endpoint option that supports JSON payloads

Context

In workflows, you can only Send a form to a URL, either as a HTTP POST or GET.

Many modern CRM API's like MailChimp only accept JSON Payloads
https://mailchimp.com/developer/marketing/api/

Currently I'm having to write API wrappers to go between Umbraco (Heartcore) and the CRM's API endpoint.

[TvGessel]

We've added this to our backlog for further investigation.