{
  "manageEntity": {
    "action": "Save",
    "entityId": "197419149",
    "entityType": "Track",
    "nonce": "0x6ac5c163c8b9d041ec434b6daf12c936c180546eb2d078c4fcd213841f6dcb64",
    "signature": "0xff0baa77efa88d6774091a1dbaf1e150c128689210979ba86ab60c30637425335d65a96e8209f6f5e572e01c91ad926c0c0dfe60e50d42b3201254c6872590a51b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}