Posting to Webex when a Look/Explore changes

I need to alert some stakeholders that prefer to use webex over slack when changes happen in a given look or explore. 

So far I figured that webex has a webhook that might work for this: https://apphub.webex.com/applications/incoming-webhooks-cisco-systems-38054

Problem is looker doesn’t let me change the json that gets posted, and webex only accepts a specific format: json={'text': 'Something changed in blablabla.'}.

I could setup a machine to listen for looker posts, translate them and then post them to webex, but I would prefer to avoid that.

Anyone came across something like this before? How did you get it to work?

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