curl --request POST \
  --url https://api.returnshelper.com/uat/user/api/Vas/CreateByReturnInventoryId \
  --header 'Content-Type: application/json' \
  --header 'x-rr-apikey: <api-key>' \
  --header 'x-rr-apitoken: <api-key>' \
  --data '
{
  "createVasList": [
    {
      "returnInventoryId": "<string>",
      "createVasDetailList": [
        {
          "vasCode": "<string>",
          "notes": "<string>",
          "metaQuantity": 123,
          "vasFileList": [
            {
              "filename": "<string>",
              "fileKey": "<string>"
            }
          ]
        }
      ]
    }
  ]
}
'