{
  "manageEntity": {
    "action": "Save",
    "entityId": "209262",
    "entityType": "Track",
    "nonce": "0x3cff20967395b01334735d2ee5a31620a3ebe8313052d36e51048b9d40c7e2f3",
    "signature": "0x601408dcbdbba6158c1fcc61900cd30896f94e3e610ec5ff26c2464638b4c9dd350e58088c61e4dafebb27dfdc7f6669748beea83c6d8fa34ba53d81ec4a6d441c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}