{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896999759",
    "entityType": "Track",
    "nonce": "0x80b0950c3c54c11fddbe6c19d30cce0a939603811090d91a0060d88c12c16fcc",
    "signature": "0xf7780b9a9a9e5ccb9d27c55acbc8b1c448ddcafc116b0c8f2d6349589bb191343f804c4ecd2edffbfcc35fc80cc84057dcd6f3f96507b3cdee49bc006dde083b1c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}