{
  "manageEntity": {
    "action": "Save",
    "entityId": "488260308",
    "entityType": "Track",
    "nonce": "0x392f00831b817f7a37623c00ac44f256abcfb4c12fcd14d5804b22e9a16726b2",
    "signature": "0xe62d6d181b3e78328b4d3fe188cefa44480289b39636f066ceb557b1626530a10cd23ab299f41ac503b90ad757995bc21aaec011ec70893d95d584469cb1bd171b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}