{ "$ref": "core/room_event.json", "type": "m.call.candidates", "content": { "version" : 0, "call_id": "12345", "candidates": [ { "sdpMid": "audio", "sdpMLineIndex": 0, "candidate": "candidate:863018703 1 udp 2122260223 10.9.64.156 43670 typ host generation 0" } ] } }