{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "578231820",
    "entityType": "User",
    "nonce": "0xf52788735f8e7d1c9ca59a1f038cdbafd5e7142bbb662ae45e5c5b55bf407271",
    "signature": "0x25e0a9370a551f50c8c6f8f77bb532bd2e8687e580701013e0df71ea8b1348476a69919cb0cae924e977a99640247ed70239dddb0d3c89e5e4fa8d71c615bfad1c",
    "signer": "0xe6E712784AE218d79b91dC3A03A92FF0cFbd5a17",
    "userId": "278611500"
  }
}