{
  "manageEntity": {
    "action": "Save",
    "entityId": "819017399",
    "entityType": "Track",
    "nonce": "0xab2c19d98ec7eea5719893816bbf38a0a6f1fe631779a54b8b117b099c09364f",
    "signature": "0xffdd19515c3fe1f6ecdcebfc80b7411bfaed1b786f0a3a25fec99e80e02c386008943332e49c83e614de84836d1eab79a19a58537561c6c59118ec537b9835621b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}