curl -X POST "https://api.onekhusa.com/sandbox/v1/disbursements/batch/generateFakeTransactions" \
  --header "Authorization: Bearer your-jwt-token" \
  --header "Content-Type: application/json" \
  --header "X-Organisation-Id: FYH0NTVW0DXK" \
  --header "X-Merchant-Account-Number: 35253486" \
  --header "Accept-Language: en" \
  -d '{
    "fileType": "XLSX"
  }'

{
  "fileContentBase64": "UEsDBBQAAAAIAA..."
}