sitecore Engagement Automation Change the automation state of the contact
Example
This method doesn't require initialization of the tracker, which is handy if the state should be changed outside of the site context (for example in the shell).
var stateManager = AutomationStateManager.Create(contact);
automationStateManager.MoveToEngagementState(stateItem.ParentID, stateId);
stateManager.SaveChanges(AutomationManager.Provider);
