{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "983107522",
    "entityType": "User",
    "nonce": "0x1b7d5830cbe43bf0103b5f294b0accda2a5327ffd5e9249015c413b62f6b2a31",
    "signature": "0x7df4a641f6951ed7bdb2173a5e4557a75fe099b2a056a1f599f97c0d2f0a17d235c4dde7e38093b84f5c85114ced93f5b180d42b7890b518c74108733ea6dbcd1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}