{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x61e520696befdafefeb3682382cd7fc79c8d2f2a0730d1c80ea4735e78bf10ad",
    "signature": "0x71f6f888e17eccafa70dd6ebf06699895f6b578b010ab671c1d00731df55f8cb6205bdcb9c92cd08da8850b4f0326dc844b03183c761a5a9b6ef01ac144a3c971b",
    "signer": "0x3cb83Dc0BeA02d2C404C053Bb49Eda9A008776bE",
    "userId": "164461150"
  }
}