{
  "manageEntity": {
    "action": "Save",
    "entityId": "1308836738",
    "entityType": "Track",
    "nonce": "0xbd5544362c25276d25cef6ebefe3d69195ffe0804066d6a18100694da0e2c0b8",
    "signature": "0x1a542f7bd771b2cd0ae80047260e10c82794d0cbb7eba51635c1d58803e0a53076a8146a066f3fe7be16f97fe7bb84f4dafe4d3bd4f6c36787b1ceed299899011c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}