Structure reference
([
"width":int,
"height":int,
"type":int,
"properties":({
([
"type":int,
"data":string,
]),
...
}),
"layers":({
([
"name":string,
"width":int,
"height":int,
"type":type,
"properties":({
([
"type":int,
"data":string,
]),
...
}),
"mask":0 || ([
"name":string,
"width":int,
"height":int,
"properties":({
([
"type":int,
"data":string,
]),
...
}),
"image_data":([
"bpp":int,
"width":int,
"height":int,
"tiles":({
string,
...
}),
]),
]),
"image_data":([
"bpp":int,
"width":int,
"height":int,
"tiles":({
string,
...
}),
]),
]),
...
}),
"channels":({
"name":string,
"width":int,
"height":int,
"properties":({
([
"type":int,
"data":string,
]),
...
}),
"image_data":([
"bpp":int,
"width":int,
"height":int,
"tiles":({
string,
...
}),
]),
}),
])