{
  "manageEntity": {
    "action": "Save",
    "entityId": "2140064556",
    "entityType": "Track",
    "nonce": "0x174419a9bd79e8ab265a6298245874e0f8558e12a36c193d854976e43e1aac9d",
    "signature": "0xbf9f67139be9b13c3c826b7854beae4df95f48c063145103228fb7f54bbeabc32e15521ebaba5c0bf714d96a39049ce381f8267f9984bdc58408f12e0ea262101c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}