Websocket uri format for ytmusic

Trying to use the websocket API addToQueue to add music to the queue.

It appears the attempt is made as the title appears in an "add to queue"popup followed by a “Youtube Music” invalid URI error.

My payloads are as follows:

    payload = {
        "uri": "https://www.youtube.com/watch?v=ve6R_p4hsfk,
        "title": "Italian Restaurant",
        "service": "ytmusic"
    }

searching the web I see recommendation for formatting the uri:

I’ve also tried uri formatted as follows:
ytmusic:ve6R_p4hsfk
ytmusic:video:ve6R_p4hsfk
youtube:ve6R_p4hsfk
ytmusic/video/ve6R_p4hsfk

what is the correct uri to add a youtube music URL to the queue?