Solved
Creating Email Template REST Call
Hello,
Following the documentation here for creating an email template http://developers.marketo.com/rest-api/assets/email-templates/
I'm using the headers
Content-Type: multipart/form-data boundary=mktoBoundary1480963323998 |
And using the sample body provided in the guide:

As the body of the REST call:

Gives the error Content cannot be NULL.
What is the proper way to pass the request?