For further clarification on this topic:
When using a custom webhook in Make, below is an example screenshot of what the very beginning of your scenario might look like in Make… and then you could add in a whole bunch of other modules to do whatever you want to do in Airtable or other external apps.
Note that you only need to send the Record ID to Make, because you can use the Airtable Get a Record module to grab all the field information that you need from Airtable.
Hope this helps! 
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