{
  "manageEntity": {
    "action": "Save",
    "entityId": "1935519377",
    "entityType": "Track",
    "nonce": "0x6e77abfaba227d89ec507bd79b48022fef7bfdb1a991a72dd4bdaacaff85beef",
    "signature": "0xe10acdf4a94f1809d0b1acf6d50550fece84c20cee8bb2cab8626c6683ff94ae75d5c612bac369366e119edb67cec57e68738903c41a4905ded63712847d805a1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}