Let's assume you have list of prospects to change the status then
if "replied" is passed in Api call the status of a prospect for a choosen campaign changes to "replied"
if "pause" is passed in Api call the status of a prospect for a choosen campaign changes to "pause"
if "upause" is passed in Api call the status of a prospect for a choosen campaign changes to "unpause"
if "resume_later" is passed in Api call the status of a prospect for a choosen campaign changes to resume later on given date and time