{
  "manageEntity": {
    "action": "Save",
    "entityId": "2020305477",
    "entityType": "Track",
    "nonce": "0x1b2db286e60880f7d93d23f04595ddb5047cc9801c5dec5aca0c51dd9df29d28",
    "signature": "0x329f78aa0ce5704e8f1f54cd946a7fdb602ee36384548fec84822fc1e6b5a8d2078307a27e07deaed44f2a5ddc32a95003f6d30974ad9141b560845857e90a591c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}