{
  "manageEntity": {
    "action": "Save",
    "entityId": "498375",
    "entityType": "Track",
    "nonce": "0xbf1f6b00d505f33bf16a7cd5cfa016bffd9cccf0a27168f842dddd6a8ad029d3",
    "signature": "0x1b9646566ff35d9d5ebc03ecc292a04d478f19d49dd94d02090a8465f11e3bdb2497fa660cc984951caa1604476ce6a5838900ccdf49b968cf7eeb09ab8fc99f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}