{
  "manageEntity": {
    "action": "Save",
    "entityId": "1044919204",
    "entityType": "Track",
    "nonce": "0x7b2b063ea6edacfa468482ae06e422877d944d2ff30fb2b78d88f00762f8174d",
    "signature": "0xf5f175b6db8117a63e92afad548e3d7045ac61607da2421d406c2713bf048e76106e2fb53cde2e6626be40f0eee31a9941a42d40949636a3d9645ad0d401b5941c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}