{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9b2d99a6cd898017ba0a18937361e41866e15f3ab3d4798ebd0d15f131251a5d",
    "signature": "0x3a7112d87f34edf6fc6ed6ec120341ed9388c91adee129ebfc827bd60ad035043b3046fdec1f0bc2e9d56bfcae5677c66ad0b5ae8f5ee24dd28fd619c11fd9fe1c",
    "signer": "0x4905E9Eb492e277Ad8515096E7AdDfEAF2dffFc7",
    "userId": "529290107"
  }
}