{
  "manageEntity": {
    "action": "Save",
    "entityId": "1592020883",
    "entityType": "Track",
    "nonce": "0x984b2e9e531a3ca970087143ea3c32e9347aabe35a9d3e6ccd520681a9a3164b",
    "signature": "0x12ee39fb687a9341d14ed5d964fecc717b746281175c5b08969921a30f68aa507fffbece9767a538a3423e8c8466ac60fc81fa241e20962a3be3547b561f503b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}