{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1721",
    "entityType": "User",
    "nonce": "0xd3700a3df0112081a5d26ca421c10cffbc0ce590e1f2d276c7f3198ca2863e99",
    "signature": "0x3ba306240db7287c56164cb9b60e2e6ebab5c58484ebed7d735737c62b3329477f6c3ec0d21e97e9931a2eda8f8d6d2611f0dce6565b2bca661f2c3684609c571b",
    "signer": "0x5a7B3A7caabFa09e84C3700488a4e04ed2167BDc",
    "userId": "661577095"
  }
}