Is there a way to publish workflow to a content type using the webservice

Our current projects requires us to deploy a workflow to more than 50 site collections each with 20+ libraries so we are currently exploring automated deployment using the webservice. One of the ideas was to someone deploy a site collection reusable workflow to a content type and reuse that content type. Reading through the webservice, I cant find any methods that let's us publish the workflow directly to a content type. Is there a workaround for this?