{
  "manageEntity": {
    "action": "Save",
    "entityId": "540343027",
    "entityType": "Track",
    "nonce": "0x1c2061db25ed0dc42d6191fd12d992948d63f29904e7134d9d496f7325e68611",
    "signature": "0xb0fba6ec0243a90147ee0a470a57654d19a00bd7f2f46aec513591521ebadcb01a14b50d1004e4443ecd64f559267fa7307fc613d3dd7300dbfaa782b92042bf1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}