{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "749",
    "entityType": "User",
    "nonce": "0x6be86d176f2e6741723e4495aa94f96cf93e0806ed4c23a4f913b416ff250dd3",
    "signature": "0x346be62c6d1c9123334bf092116f55bee1406e176bd587017a5e5a20ff6abec327306415c56ca92d1bed802b2c138769114b1ac143b49d21cdd55c9df4d568941b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}