{
  "manageEntity": {
    "action": "Save",
    "entityId": "731326743",
    "entityType": "Track",
    "nonce": "0xa9d78e85c941d486d039d2a97e93785291308d8fded4c4a28ee23c9766ce2c41",
    "signature": "0xbecd08f21c6e800332e9ce2b66dfbf57a3dfc099fe61b60deb491ce001c6d8756f758f7c43cb5a7ed282fb0d1dd49f8feb7e65716cafe0a05f5838969a9d8d591b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}