{
  "age": 242352,
  "content": {
    "membership": "join",
    "avatar_url": "mxc://localhost/SEsfnsuifSDFSSEF#auto",
    "displayname": "Alice Margatroid",
    "token": "pc98",
    "public_key": "abc123",
    "key_validity_url": "https://magic.forest/verifykey",
    "signature": "q1w2e3",
    "sender": "@zun:zun.soft"
  },
  "state_key": "@alice:localhost",
  "origin_server_ts": 1431961217939,
  "event_id": "$WLGTSEFSEF:localhost",
  "type": "m.room.member",
  "room_id": "!Cuyf34gef24t:localhost",
  "user_id": "@example:localhost"
}