When we submit an upsert change through the REST API, is it possible to attach a custom Source or Reason with the event?
Normally, after I submit a change, I can see the updated field in that Lead's activity list, it shows the old value, the new value, the time of the change, a Source, and a Reason.
If I log into Marketo and update a Lead by hand, the activity gets a Source of "Person update" and a Reason of "Manual person edit"
If I go through the API, both fields get set to "Web service API"
Could I have my API call save a reason like "My First API Application"