{
  "manageEntity": {
    "action": "Save",
    "entityId": "1056137",
    "entityType": "Track",
    "nonce": "0x4859b403c1eb2e34071f9731a6ffc28ce360e8d57b850429da53195e6bf98076",
    "signature": "0x4b35d3b97b9aad10a58899f9c9d430ad68954ce63696c047b3a449933a9cf2cf1c51b31ff182cc89ededa78468737b0fc59e9c0c29c3bbdd9df7370707b032d11b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}