{
  "manageEntity": {
    "action": "Save",
    "entityId": "442162449",
    "entityType": "Track",
    "nonce": "0xa16d9bae6277b22e37a038cbff6c3c13a8a21e70b8945c359810c6979d6d49df",
    "signature": "0x245ac465efd049308e7ff1e76808f690029f8e8d0d60ef3457c881479609a83c7ef50d4b4af7479d5b7d1191163eb43a88196b6f99a90751b227f0fd837914dc1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}