{
  "manageEntity": {
    "action": "Save",
    "entityId": "1617048350",
    "entityType": "Track",
    "nonce": "0x17d1f9e0dbb38638500993b98028110f8a6a583bc2bf35595ef66a855d0f546c",
    "signature": "0x346c41c795e895c6c2758da8bf6bb61aa32edb55843fa9027415aa39327c242b4f2903a6d16322c94952f6a198546c843d115d59986c490f6b488de1d80185771c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}