{
  "manageEntity": {
    "action": "Save",
    "entityId": "2034367731",
    "entityType": "Track",
    "nonce": "0x5772dbeb570886a406a16b1e26de250b3cba0678b904adfb17ef9dfcbece7d1c",
    "signature": "0xdcbf45ccb8b780382c20353a60996545a0162616f701e722277a48c576ce2a785a4c45e8c885119633282b7c43fd08210c728e5f18a87a421c45b07f61d6c5611b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}