{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3910a052dea338c7e386b52b3f72dcbf9e3e96c59dc59191c2386d544fc0ee0a",
    "signature": "0x02126bcb96a8d2c69ea094d96196c30cb1e8a8e8246f1c08ec9edb1c9a4932573e8902162a9711b41cf738f7a8308f6b8dbcdbacc96b0bf92d94a7b3c6364bfb1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}