{
  "manageEntity": {
    "action": "Save",
    "entityId": "303039",
    "entityType": "Track",
    "nonce": "0xe70c9253149d582cf824f6d8beaf44a1c1508eafbc3067ccc88b777039633daf",
    "signature": "0x5c6a84892de44b8a5baefb562028edf1af577f5cc15452e440f4fed2acbb6f117c62efd8fc91910a3cbdcfe4a0b9932d660b7d1afd43599efa2b5783231c3c871c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}