{
  "manageEntity": {
    "action": "Save",
    "entityId": "258322634",
    "entityType": "Track",
    "nonce": "0x78e5cdd5b64bfdda3602b5d8575239e31edb514fbdee7923a9b663b041bb96c3",
    "signature": "0xf683b4ce8fe4b1f4462f4c71e535ed64eec0dfaebbea3ce5f8fa426d28b2c4e96f44a53d13b9e63efdebd4311e47a6da828d1c446b9b99a8558a47d072ea5b9a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}