subj. how is it possible?
here http://dev.splunk.com/view/python-sdk/SP-CAAAEK2#savedsearchparams the params action.email and action.script are marked as read-only 😞
To Set action.email to 1... send the param "actions" as "email"...
This works for email.. try the same for "alert"
Refer the below rest url of your environment for the internal parameter names used... While creating alerts pragmatically we have to use these parameters...(Applicable for all entities in splunk... :))
https://localhost:8089/servicesNS/UserName/AppName/saved/searches