This command gives me a diamond pickaxe with a single enchantment at maximum level:
give @p diamond_axe{Enchantments:[{id:"minecraft:unbreaking",lvl:255s}]} 1
Similarly, this command gives a potion that effects the consumer with Speed I for 30 seconds:
give @p minecraft:potion{CustomPotionEffects:[{Id:1, Amplifier:0, Duration:600}]}
I would like to apply multiple of these list-style properties on my item. How can I do so?