{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12743",
    "entityType": "User",
    "nonce": "0x7cdbcf969bd0930a9cb6a503c6a19323d47e709c87c20969a948bb3760554517",
    "signature": "0xa288f2b27f830aa19133c0a2bff5d63cb0f925febaa7853a7f67f081bdee0ca85f6322b39a1100f955566a872d87cd88b38fb8b53eeecfde927530ee36aeb3ef1b",
    "signer": "0xb8Bf68e2681FA1A8a8ce9c78070BF9644e947378",
    "userId": "12890"
  }
}