{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "638733607",
    "entityType": "User",
    "nonce": "0x02642b31a114e28c64992b91662dae10cdf633e81a93fd1f4948d4253b8d18e0",
    "signature": "0x8d3049df4e969be1a09fe304425054bb30038a4494b2c76cc170409593dc14e830c7dae65d49a3b2c10ff66260d3ea48f64a69c5f6945ccade8ae2ea6f64bb2f1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}