{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54120",
    "entityType": "User",
    "nonce": "0x640b82958cad86155aa7df07b8468013798416e019af08aa08874fe6df01e9ef",
    "signature": "0xc51b946cb960308ca1aa6220f59ea35fe3bfd5bc76ee07a087b6ee3ee83cf92549a11a2987e3ebcae900ff04d4b63fea4123ceb9d2ca1fb897204864e144886b1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}