{
  "manageEntity": {
    "action": "Save",
    "entityId": "965779",
    "entityType": "Track",
    "nonce": "1792826444597084160",
    "signature": "0x63a2d512df8763b88fed2797c99305b185a9c2e128c9c23adcd435d57995a4823a934bff88e51822829f35a3e237f1c9ff1d37938225d12bc3911d98fdd8a7631b",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}