{
  "manageEntity": {
    "action": "Save",
    "entityId": "399104486",
    "entityType": "Track",
    "nonce": "0xcca73988bcda64ddfb627bd677926c37b32f4ed80af8556c44fc308703666f51",
    "signature": "0xeadbd97314cb5eea4df93a5ffb9a4d8849c09b3dd2a776b8404621ecd3c65c4c0337aa51af918913530e3c4643c4868db76d0293ddbabd297dcac7d4a116f6341b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}