{
  "manageEntity": {
    "action": "Save",
    "entityId": "25199",
    "entityType": "Track",
    "nonce": "1789533884144026045",
    "signature": "0x8fba444fc95c4f4b665c94f5e2b92bcb7bd730604ec06606065682194ed248024c855e9cd8857f8dde2f75eadfcbfb20149c0f74e3565aef778f542c5662ca0d1c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}