{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "394450",
    "entityType": "User",
    "nonce": "0xa9d49b961d00cb981b4572a6d5d602ef829618212a1845dccb28e5ab4cd9eade",
    "signature": "0x9035043b2d851d76f6bfb5796b91d8a17adc47983ddb365b35db15d55924759e0f2f104a4e3ccf238b7c7d7c0a00f66d40dec687006b4aaf2c425d38b57dd6371c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}