{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0x65b0542bdbafa4755287e742d936da7cda69888d2385986f0d96c82bbe60b5a2",
    "signature": "0x95f82091f3bf0c07da1772c8ba1b1ffb2a265e53f3b0f70f444b257d53b7728236d78c3b6957142a86a37311ef05aa56556ddc599c79d55fbf924d3397ce39e01c",
    "signer": "0x7F52035F6FD8a71240adf35768244d51512553c8",
    "userId": "550902409"
  }
}