{
  "manageEntity": {
    "action": "Save",
    "entityId": "1322021560",
    "entityType": "Track",
    "nonce": "0xeaf3e47613154047b42efd1f8a2bad15e199849b8c364dd070ff83736c64d9ce",
    "signature": "0x72dde080b6a28f25b1a39e6e12c89b7c98df79e583dd40dd443b8b221915d70801edc16ed14cbca362ae252f38884c6d7176bf178fea5e859a5f262e481d78331c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}