{
  "manageEntity": {
    "action": "Save",
    "entityId": "1090390403",
    "entityType": "Track",
    "nonce": "0x9d9aaeac89da66b6953dc1e25dc259719c942095df9261532626bd7c9780bca0",
    "signature": "0x437116fc61319617a2b449e6f523dc6fd3744a8b418904e6d53085616977813e4513cc68ab300ebfd9194f571c2dc4c8bb6a726b615c380a12097d6145471aee1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}