{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "634919676",
    "entityType": "User",
    "nonce": "0x9b23fdb2b927079ef8a58dd52f3ef6e41a50a3642e9006b156306688eedb668d",
    "signature": "0x5776f8b8a55c4102c4e2943c367fcdc744f81eaeb56ea0539f8adfb60ba6478e6089aa61e36794f0f75e4cde33611e3daf4dfcec1651f860fa8809e28cc868f71c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}