Help with controlling OBS with Websockets ?

Hi all, I have succsesfully connected to OBS WebSocket server ("ws://localhost:4444") - but I can't send a command successfully from construct 3 using the "send text" Websocket. What I wish to achieve is switching scenes in OBS and seeing the result in a "UserMedia" object which shows the virtual camera with some funky overlays from OBS.

If anybody has an example capx or could put a working websocket example together for me - happy to pay a fee for the work or make a donation?

Thanks for any support