On the running of import jobs, if we configure the job in the GUI and then just want to run it via the API (with no additional parameters), we do have an API that will do just that:
POST ~api/setup/ate/run/<guid-of-job>
No content, just a POST. If we need to parameterize the job, we'll be back to a POST to ~api/entity to setup the parameters and then the above to invoke the job (but no need for a Time Schedule).
Page url: ?runningimportjobs.htm