{
  "manageEntity": {
    "action": "Save",
    "entityId": "1218894616",
    "entityType": "Track",
    "nonce": "0x2088092e6014f87588424418985cc72567f0a6923eaa5317a12d7abf77224050",
    "signature": "0x624e3e35ee9f40bf1fab4a13c6bfd4dca0ca0619703a94eac30dba1c392de6ee1e657441413b68aa664b385adb80c5c26a37d825e40630906fd5a1baf2f6772a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}