{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990836999",
    "entityType": "User",
    "nonce": "0x2f074c1d7568ab364d4a331de30249f8c5aa664fee6b68dcbb8d0d8bfe292b73",
    "signature": "0xa9748b2bc65a84b64706a4157d7716bd287d7cd55ca3c7fd828d9ec4ce2a720f64fee428fddee14ee2d61b05f7d55a03336a58e276b236f5144bc76b4c53a78f1c",
    "signer": "0x5C13CD392EcB86FaceF8A07FC5B300833E86cD23",
    "userId": "167249"
  }
}