When creating an email via the API, how do I mark it as "Preview: public"?

I’m able to create an email via the rest API just fine and can mark it as “enabled”, but can’t figure out how to mark it as “Preview: Public”. Is there a JSON field I can set while creating the email?
When I do a get on an existing email that is public, I don’t see any relevant field to indicate the preview state.
Is there maybe a different API that handles the preview state?

Doing a little more digging, I see this field in app/bundles/EmailBundle/Entity/Email.php
private $publicPreview = 0;
but setting this to True in my JSON (“publicPreview”: True,) does not result in setting the value in Mautic. I’m just not familiar enough with how the API JSON is processed into an Email PHP object.
Any pointers?

Did you figure this out @pstrimbu ?

The public preview was introduced late - I could imagine it was forgotten with regards to the API?