{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1607",
    "entityType": "User",
    "nonce": "0x993d965b053acd2f9a444b94a55a5bbea74d9fabd6dbb7b78cb324f8676f7c63",
    "signature": "0x9306916a3d88dcf089b4a8d23a6877ca786e2170d3549afa1a042e580395a27a1f50c6c2a01c1db66c87c037dd984e110187b87a1548448e6f9c7c95bc716df21c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}