{
  "$ref": "m.room.member",
  "content": {
    "membership": "invite",
    "avatar_url": "mxc://example.org/SEsfnsuifSDFSSEF",
    "displayname": "Alice Margatroid",
    "third_party_invite": {
      "display_name": "alice",
      "signed": {
        "mxid": "@alice:example.org",
        "signatures": {
          "magic.forest": {
            "ed25519:3": "fQpGIW1Snz+pwLZu6sTy2aHy/DYWWTspTJRPyNp0PKkymfIsNffysMl6ObMMFdIJhk6g6pwlIqZ54rxo8SLmAg"
          }
        },
        "token": "abc123"
      }
    }
  }
}