{
  "manageEntity": {
    "action": "Save",
    "entityId": "299297",
    "entityType": "Track",
    "nonce": "0x689845b078213bed2b8c62d001bf0067b9bc27b63773e52af2655b816b2c2e95",
    "signature": "0x197505ca755fe98aad66cf5d767c3875b89578800616343d6cdc0c3fff81fafa23a8a12fef2c6d0daf4f9b659db31872b1f74309a11552e6137eb523d50b2d681b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}