{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xf0adf79094d27cfc29b8c6db00bcfd97a50a06065356e1ccb3e6a5287b55ed84",
    "signature": "0xeafba2928dab7b7afbc3dc81d6e27c6faeacfe6b19e1681bad9eb6a1a9fb21b7466e0e35a247d8ac89319fa016d3634cff1778e0c81e33ec99db22cc91ee19571b",
    "signer": "0xf86eFbd04a21E17dBD9908C016306c8211e740B4",
    "userId": "770730210"
  }
}