{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "999548897",
    "entityType": "User",
    "nonce": "0x621ed8c82e798149e1447b7a79e64683a845b6c6692634a4c0d176f9b3a9f482",
    "signature": "0xeec4543ec59852d0095aaec98ba8f8e2eb2850c88cb9cded76f95480686a44743a4af59761ad6cbcbc1fe6ea019599f3ed04b3649d4057b2dd5d63becb7d68011b",
    "signer": "0x2aF04528b05939B9f7F5D99Fd67081660907b6b6",
    "userId": "3541"
  }
}