Hi @manthan,
Sorry, this isn’t currently available via webhooks 
Can I convert this into a feature request for you (or you can do it yourself?)
Right now, the only way I can see to get that info is via the Audit Log, but that’s only available to Enterprise customers: Audit Logs — General concepts — DatoCMS
I think it makes sense to have that be a part of standard webhooks, though, and it’d be a good feature request if that’s ok with you?
Previous threads on the topic:
- Is it possible to get the user responsible for a webhook event?
- User on the Webhook body
- Update Webhook Missing User Information - #3 by m.finamor (the workaround listed there doesn’t apply to workflow changes, unfortunately)