{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    "https://w3id.org/security/v1"
  ],
  "type": "Person",
  "id": "https://example.social/users/sam",
  "preferredUsername": "sam",
  "inbox": "https://example.social/inbox",
  "publicKey": {
    "id": "https://example.social/users/sam#main-key",
    "owner": "https://example.social/users/sam",
    "publicKeyPem": "-----BEGIN PUBLIC KEY-----\n...\n----END PUBLIC KEY----"
  }
}