{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938669936",
    "entityType": "Track",
    "nonce": "0x81342f5ee926648fba674491ece785b2041e33559dff3fce19c93974c74e9c2d",
    "signature": "0x658c071a14d50f42041cf73824461d28c27119080a3420e46fdf185e2ad862673a6476c642cf16219d1ad4051acb9bf9fa4a478ab5af2d0d7e00a0185e0630b21c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}