API request for Private Listening mode

Hey guys, for some reason the SmartThings app doesn’t have many options or shortcuts for my soundbar Q990D so im trying to make one for iPhone to enable/disable Private Listening mode (rear speakers only). There’s nothing in the API docs about it, but I can enable/disable the feature on the app. I’ve ran Proxyman and not had much luck trying to get it to work in Postman. Any tips would be greatly appreciated.

Couple things I’d suggest. One is use the ST Advanced Web App to see if there is a published command to set the listening mode. You could then use a browser developer tools to see what the API call is and the JSON body being submitted.

The other was would be to use the ST CLI on your Linux/Windows/macOS computer with the debug environment variable set. If there is a command to set the listening mode, the API call will be displayed in debug mode.