{
  "manageEntity": {
    "action": "Save",
    "entityId": "1559686212",
    "entityType": "Track",
    "nonce": "0x9f514df7330498039223bcdd597d088bd3e28c04ad6d49f576f0cc57436f0426",
    "signature": "0x008bc94f7dec31948ecbae879c97ccb3235396ed8624ae421545d07751027dc27b3269a93465dd42aaf6f0d95521f21bda31af39388f8453fd0d8736cd3fb7cb1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}