you can use the campaign Application API endpoint
campaigntype: is used to identify simple email campaign or Multistep campaign.
if you open the developertools(F12) in your browser and when you save a simple email campaign you will see what endpoint is used and which parameters are sent over when saving the campaign
That's a great response there. I was fairly sure teh elements array was the place to look but wqasn't sure what to put in there. The developer tools advice has nailed that down for me.
Thanks for your guisance.
Here is a post that provides an example of creating a campaign with steps using the Application API - Creating an Eloqua Campaign with Steps Using the REST API.
Once the campaign is created it can be activated using this endpoint - Activate a campaign.