{
  "manageEntity": {
    "action": "Save",
    "entityId": "1971394317",
    "entityType": "Track",
    "nonce": "0x4809c70befbc0b0f3905c389dacc2641ade0c279ffa4583c72cb68f9c4966abb",
    "signature": "0x5909cad072231b07d93a65fc3825692005272fadbc805240d8059cb033c7b5e072539707d5e9292898cba5b2dcedce98200a2d2d3e6c1bda2298f6db1fb136001c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}