{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xef97c608bdfc83d31715c02ea508c617f59d1b79948788ce403a4e4c84fa9dd2",
    "signature": "0x3468fe8806c8662fb8bbedb3a5fa95d8450a2534ebe8c8ba844c4d73385a2b263e1583cdefee7397a4bb59ad217543dd75986ac4af21030c2bf2d40b5220571b1c",
    "signer": "0xCb40b925b41c0C63144690Cd12A09D902130930F",
    "userId": "520685580"
  }
}