How to creating NBT list

[Intezium]

How to create NBT of such structure?

Tier1
{
	Tier2
	{
		String
		Int
		
		Tier3
		{
			Int
		}
	},
	Tier2
	{
		String
		Int
		
		Tier3
		{
			Int
		}
	},
	Tier2
	{
		String
		Int
		
		Tier3
		{
			Int
		}
	}
{

[warjort]

The (S)NBT format is explained here:
https://minecraft.fandom.com/wiki/NBT_format#:~:text=The%20Named%20Binary%20Tag%20(NBT,Binary%20Tag%20(SNBT)%20format.
a list is expressed like in json using square brackets and commas.

For doing it in java, this should give you some idea how it works (see NbtElement and its subclasses):

                // A list of lists
		NbtList list = new NbtList();
		NbtList innerList1 = new NbtList();
		list.add(innerList1);

                // Add tags to the inner list
		NbtCompound tag1 = new NbtCompound();
		tag1.putString("greeting", "hello");
		tag1.putInt("amount", 0);
		innerList1.add(tag1);

		NbtCompound tag2 = new NbtCompound();
		tag2.putString("greeting", "bonjour");
		tag2.putInt("amount", 1);
		innerList1.add(tag2);

                // outputs: [[{amount:0,greeting:"hello"},{amount:1,greeting:"bonjour"}]]
		System.out.println(list);