Dynamic Value in Header of API POST

Hi all,

I am trying to put in a dynamic value into the Header section of the API Connector. This header value is the SHA256 hash for the POST message that is being sent.

How can I enter dynamic value in the header? The image below highlights my problem.

@kaventan since private is already unchecked, you should be able to pass value dynamically in the action in workflow editor

This is by bar the one thing I am stuck on in bubble. Can someone me an example of how to initialize this POST request?

To be more specific, what do I have to put in here:

I have tried every kind of way but I’m obviously missing something.