{
  "type": "about",
  "about": "%iaTFOseYdPzZXnvr8TJNmfjLxy6L4OjxhcUlSy7aFtY=.sha256",
  "attendee": {
    "link": "@Bp5Z5TQKv6E/Y+QZn/3LiDWMPi63EP8MHsXZ4tiIb2w=.ed25519"
  }
}