Rocket chat websocket integration not working

We are trying to integrate the rocket chat with wavemaker websocket.

For rocket chat we are using this

and for wavemaker integration via websocket we are using this

now the problem that i am getting is that the websocket gets connected but returns empty response.

Tried passing the variables/params told in this

But none of them is working, need to know how will it connect. Let me know what you pass in body params, query params and path params in the image as shown. To receive an appropriate response.