{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "614648639",
    "entityType": "User",
    "nonce": "0xdd513dd7bc79286dc42641661a685f23db7ebe30de91972b9f0991b68e2c53eb",
    "signature": "0xbbaba74d0fe249251afe7858a26112e241c29890cc9eb9540753f44ac338abdb758e21da72bf7166cb56925b7b055ed3e0678e90c782269210b95198bf8aadb01b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}