{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0xc7d880c3d33a69e9b974b6d2c9cbb422d8f22231a9b50b388c451c76a155593e",
    "signature": "0x1f8a2b10770acc664d67a9395108a60b13b1cb940ba638e48a1c30b42350d0d350abb0708dd89e65806084b7d8b0fa8ce2cd6870f70701e1444241283e8b55f11b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}