invoicePayload = Map();
invoicePayload.put("invoice_id", "INV-1042");
invoicePayload.put("amount", 2500);
invoicePayload.put("currency", "USD");

try
{
   response = invokeUrl
   [
       url : "https://api.example.com/invoices"
       type : POST
       parameters : invoicePayload
   ];
   if(response.get("status") != "success")
   {
       throw {
           "message" : "Invoice sync failed",
           "data" : response
       };
   }
   info "Invoice synced successfully.";
}
catch(e)
{
   info "Sync failed: " + e.message;
   info "API response: " + e.data;
   info "Line number: " + e.lineNo;
}

try
{
   try
   {
       // sync logic here
   }
   catch(e)
   {
       info "Sync failed: " + e.message;   // local logging
       throw e;                                    // re-throw to outer catch
   }
}
catch(e)
{
   // outer handler: notify the user, roll back, alert admin, etc.
}