{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3a9815d62a721f534da921cded5c0e862be85383c11d5c81d5896220e55982e2",
    "signature": "0x4f7e1559abd5b96e39f6b8678611e8a2c62552f12c8b31b73af6de3f1bae057e083bce05ef0750b6fad6f934f2471b6c8348e9551e37f3b15f0218e2369e01e91b",
    "signer": "0xAD915A386ad837fE8aE98a5c251EC61d50dc8245",
    "userId": "672019090"
  }
}