{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343346",
    "entityType": "User",
    "nonce": "0x75c3b7fb1d87aacee83ad17ace2ad071ce2d94ef85725490110ec4b752c610c9",
    "signature": "0xb430e4210710e16c70c8ab10f4ca448828d01cfb50906e024dd4c6a8abb2f3c5160b197ff304e0e7ebf707c9cf8a10ae7107d21ce7beac9d96bb91bef1fb24e91c",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}