{
  "manageEntity": {
    "action": "Save",
    "entityId": "1333577457",
    "entityType": "Track",
    "nonce": "1792307178422970599",
    "signature": "0x9ee2b2ed764250d2d0f63a6fef63bce7bb5511263f64b2df45fdaa9273babac309e557110fdaef8f3858db55a17186a0d4e6f9f4a5ab78b35f7219ae5ee9a1da1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}