{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "42121",
    "entityType": "User",
    "nonce": "0xa35d1d3633638768739f31994d8e596469d8f8b9a935d65bf849f23c7af7e726",
    "signature": "0x8f1bfa9d804c84808d9191264a54f483ace115157db54b4cceb7cf3c12cc15a43a9b88042494ab81278234bf70c43e678f6d8611559dbc8905d9bb16ed31fb5c1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}