{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "708077815",
    "entityType": "User",
    "nonce": "0x3b53358ccdd643fb2ca468b9a67dc495346bff96131e60c894367b5f1fc9e0d4",
    "signature": "0x457a87ffb5ab8f45ad3554437bd67e438773ec008367cf07c367b9db0d26746b78145b6e9514a7bc3f4e30fed057c528eb3c6f0884f3826706b6985d87c793111c",
    "signer": "0x1b3E9Ea15dF71Ced48bA8E493c9BBBcBFa25823a",
    "userId": "913385866"
  }
}