{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "571869547",
    "entityType": "User",
    "nonce": "0x13150c57a712c253e8de5663983a9d96f5e56d7fa3bea3ac3c305cb68cd8f230",
    "signature": "0x99a1506e7386254846c616fb523f69e8ecac9f91ccf85f55a44919982aa75c755ab63e35b761972e1d6a9f76c733af571da4a2b2f780038c210120bce3db28d71b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}