{
  "manageEntity": {
    "action": "Save",
    "entityId": "347698423",
    "entityType": "Track",
    "nonce": "0x9717a93d547e9a8d5c439ebafc161bf3ab5331192fea83a511ea164d2c0c7460",
    "signature": "0x590871a732a645505a4c13cc941ab8de3b574aaf2de0e8c86e8cf52ae1b67c441b3c8e9d9831823a5b3573ffafcb3bf33e6888e11664c59102a4deda43167e061b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}