I could not find a documentation about how to decipher massive rows like this one below. I figured out
Second number after curly bracket starts: 17 = Instance ID (Instance name in row 17)
Last number before curly bracket ends: 4 = Difficulty (25 normal)

Are there numbers for different factions aswell? What are those numbers in [ ] for?

If this doesn't belong here sorry, feel free to delete.

[40107] = {{[1] = 17 [2] = 1 [3] = 1 [5] = 4} {[1] = 17 [2] = 2 [3] = 1 [5] = 4} {[1] = 17 [2] = 4 [3] = 1 [5] = 4} {[1] = 17 [2] = 7 [3] = 1 [5] = 4} {[1] = 17 [2] = 10 [3] = 1 [5] = 4}}

I build that files with a script so there is not really a documentation.
What do you need it for?