{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "897648338",
    "entityType": "User",
    "nonce": "0xe44828a061a73e7cfd706e28001744dcaee91a44549e18edc9e856133775ab81",
    "signature": "0x6614713ebf3c49e17c119c743f0aa0888699d888b7752f44f5c5305b1da16ee371c13239a57329f64c78c0d50d1ec6def6ade15fc494c261c172cfe6198439f61c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}