NBT 
This package implements the Named Binary Tag format of Minecraft.
The API is very similar to the standard library encoding/json.
(But fix some its problem)
If you (high probability) have used that, it is easy to use this.
Supported Struct Tags and Options
nbt- The primary tag name. See below.nbtkey- The key name of the field (Used to support commas,in tag names)
The nbt tag
In most cases, you only need this one to specify the name of the tag.
The format of nbt struct tag: <nbt tag>[,opt].
It's a comma-separated list of options. The first item is the name of the tag, and the rest are options.
Like this:
type MyStruct struct {
Name string `nbt:"name"`
}
To tell the encoder not to encode a field, use -:
type MyStruct struct {
Internal string `nbt:"-"`
}
To tell the encoder to skip the field if it is zero value, use omitempty:
type MyStruct struct {
Name string `nbt:"name,omitempty"`
}
Fields typed []byte, []int32 and []int64 will be encoded as TagByteArray, TagIntArray and TagLongArray respectively by default.
You can override this behavior by specifying encode them asTagList by using list:
type MyStruct struct {
Data []byte `nbt:"data,list"`
}
The nbtkey tag
Common issue with JSON standard libraries: inability to specify keys containing commas for structures.
(e.g {"a,b" : "c"})
So this is a workaround for that:
type MyStruct struct {
AB string `nbt:",omitempty" nbtkey:"a,b"`
}