{
  "manageEntity": {
    "action": "Save",
    "entityId": "1838416217",
    "entityType": "Track",
    "nonce": "0x78d79407592534f27a14790ee7a17e33be5c0ffd56e5e25e1d7a1f52d64acecc",
    "signature": "0xa93ceb4ea2fdf7dcaab4498a564cd4a75abdb54591378ead51d23f2d0ff1246725dab8586b6cac10f1a697682de5844578c5725e9f77843742b9f5ca04358ead1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}