{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "631452751",
    "entityType": "User",
    "nonce": "0xb08c47174ac923aff4b6571b0d7d08dc3a88ea7d8aabd72ba6e819eadf66c211",
    "signature": "0x999b91db6a8c272fbb76ef64e8842a6e64d8d08f57a995768446b853f79a21c10984c3d1e687d9d73dd57c19c6220487c3291de07e7e95e35b83f2cceab70b3a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}