code: public ArrayList<Long> serviceName_changeContact_POST(String serviceName, String contactAdmin, String contactBilling, String contactTech) throws IOException {
  		String qPath = "/deskaas/{serviceName}/changeContact";
  		StringBuilder sb = path(qPath, serviceName);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "contactAdmin", contactAdmin);
  		addBody(o, "contactBilling", contactBilling);
  		addBody(o, "contactTech", contactTech);
  		String resp = exec(qPath, "POST", sb.toString(), o);
  		return convertTo(resp, t1);
  	}
docs: Launch a contact change procedure
  
  REST: POST /deskaas/{serviceName}/changeContact
  @param contactAdmin The contact to set as admin contact
  @param contactTech The contact to set as tech contact
  @param contactBilling The contact to set as billing contact
  @param serviceName [required] Domain of the service