{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "665",
    "entityType": "User",
    "nonce": "0xcdc04cf1ce23dcbf9dc996d9b36dc1b01104f0eab593b62e0c47eaa3af539949",
    "signature": "0x2305e0aecffae511f74f546da250410455c20fe464d48b3e6c6dad397dfadf5b17ce3778a3e7bcfbad8e079effcd7e4689528979f30808805fdb08c62676eb9a1c",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}