{
  "manageEntity": {
    "action": "Save",
    "entityId": "1613763010",
    "entityType": "Track",
    "nonce": "1786556031294388309",
    "signature": "0x718a1156ceb77bf2881efa09fffe25951d9ce84389d99f8524ae8fdc5e1a488f36eb27b2e688fad12df29bda39ff315416260d141e0d98c11bc1b0cd747837c91c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}