Websocket API components

Hi there,

I am trying to add a websocket api datasource to my grafana cloud.

End point : wss://ftx.com/ws/
parameters (i put it in header) : {‘type’: ‘subscribed’, ‘channel’: ‘trades’, ‘market’: ‘BTC-PERP’}

Nonetheless when i run a test query I dont get any data. As everyone managed to get data using the Websocket components with header?

THak you for your time