ies = []
ies.append({ "iei" : "", "value" : "Detach type", "type" : "Detach type", "reference" : "9.9.3.7", "presence" : "M", "format" : "V", "length" : "1/2"})
ies.append({ "iei" : "", "value" : "EPS mobile identity", "type" : "EPS mobile identity", "reference" : "9.9.3.12", "presence" : "M", "format" : "LV", "length" : "5-12"})
msg_list[key]["ies"] = ies