{ "age": 242352, "content": { "version" : 0, "call_id": "12345", "lifetime": 60000, "answer": { "type" : "answer", "sdp" : "v=0\r\no=- 6584580628695956864 2 IN IP4 127.0.0.1[...]" } }, "origin_server_ts": 1431961217939, "event_id": "$WLGTSEFSEF:localhost", "type": "m.call.answer", "room_id": "!Cuyf34gef24t:localhost", "sender": "@example:localhost" }