HTTP Action in Workflows

Hey @colin_mckibben This isn’t working for me. I am just trying out simple test workflow where I am trying to send identity id to webhook but I get below error while building workflow itself.

If I try “Enter Value” option with same body, it is not replacing variable

I see this thread where it says dynamic variable substitution is still not available in http action. Workflows: How to dynamically create request body in HTTP action
Can you confirm if this should work or not?