I ran into two typos in the webhook event documentation that threw me:
POST job create event: the data field transport_type should read transportType (all other events that include a transport type field are correct as-is).
POST driver update event: the data field deliveries[].client_reference should read deliveries[].clientReference (all other events that include a deliveries array are correct as-is).
Thank you for your due diligence & informing us of this typo. This is be corrected shortly and the document will be reviewed for any other similar instances.
I hope you were still able to understand the webhook event documentation and able to conduct any testing required on your end?