{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "120199991",
    "entityType": "User",
    "nonce": "0x738f0049c4ff7c421ce0f4813d798397f70ce86c76f2761c6f7a894b049b8fcf",
    "signature": "0x9b4c5e22266c2df359dedb3e6a2c74bff651600d153c9f8da77c16f68e4d80db28bc70f21f355f384c6e1bf904be8488ec233c175ac0fd184531973ff278fb1f1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}