Thanks for your response.
For your question "Once the external system responds with a success message to Freshsales Suite, Is there anything specific you want to be happening in Freshsales Suite? " -> When external system process successfully, it may response with a ID, and we want this ID to be updated back into the Deal record’s custom field.
I have another question which is related to this. I saw this page How to use workflows with Webhooks in Freshsales? : Freshsales Classic
It says we will received an email informing that Webhook has failed. This email message seems generic, there is no useful information such as what is Deal name, etc. (Assuming this Webhook was triggered when a Deal moved to Won). So we have no idea for which particular Deal record that this Webhook event has failed.
Or is there anywhere that we can see a detailed log captured or something like this?