{
  "manageEntity": {
    "action": "Save",
    "entityId": "686223763",
    "entityType": "Track",
    "nonce": "0xd1f1587e11d754b701ced0f966ebf91bbe5764ce840b460d863ff9b05aa5007d",
    "signature": "0x36cf7bf2adc5c3988d9c82813b307ffee31db4876afd6604d20ba18a9d83993d5471f50ca8439c93806453c3d7c705da1db67f686529141740fa6ff15857e5551b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}