How to add authentication action to existing WPM recordings? (for the new Web Transaction Recorder)

How to make it for deprecated one is described here:

But new Recorder uses other file format (yaml I guess), so this method is not suitable.

The problem is to authenticate user with simple auth form (or when Windows security window form appears). So with depricated Recorder I used this lifehack with manual adding action type="Authenticate" into recording file. The same problem I have now, with new Recorder (browser window is blank with red border, but Windows security window expected), so I'd like to know how to fix this issue.