{
  "manageEntity": {
    "action": "Save",
    "entityId": "1353322988",
    "entityType": "Track",
    "nonce": "1791506085602198728",
    "signature": "0x62834da920097db737b0ee15c5b4eeed96386fd3056ea20ac4da46bf466782a9235a164bf26555c3f62b92271e9c29db0660614c614e0a2c65bcc795ed666a7c1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}