How do I add Attributes to items? (NBT etc etc)

Hi, when making stuff like weapons and armor, MCreator allows you to edit the two standard attributes often seen on those items (Swords have Attack Speed and Damage, Armor have Armor and Armor Toughness). But what if I want to set other attributes to those items... like Movement Speed or Max Health? I don't want these stats to be temporary, I just want them to be a part of the item pernenantly. Thanks!