What is the best way to create a wave/subwave based system?

I'm trying to make a game which is effectively a cross between Quake and MvM + Cats, so I've got a question:
What is the best way to implement waves and subwaves? My idea is using a JSON file that looks something like this:
{
"wave":[[[0,0,0],[0,0,0],[0,0,0]],[[0,0,0,0,0],[0,0,0,0,0],[0,0,0,0,0]],[[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]]]
}
I'm not entirely sure how I should go about parsing or storing something like this. Help would be great!

 

Okay, I've decided I'm using LitJSON, but every update it throws an error: "Argument Exception: The key has to be a string"
I am using the following validated JSON
{
"wave":
[
[
[0,0,0],
[0,0,0],
[0,0,0],
[0,0,0],
[0,0,0]
],
[
[0,0,0,0,0],
[0,0,0,0,0],
[0,0,0,0,0]
],
[
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
]
]
}
and the error is being called, I would assume, the line at which I try to get stuff from it, i.e.:
for (int i = 0;i<=JLevel["wave"][wave][subWave].Count;i++){}//Will add stuff in between the brackets of course.
If I could get this debugged I think I'd be set, but I'm fairly certain I'm doing this right. JLevel is initialized as JsonData before any method declarations, and being set as

JLevel = JsonMapper.ToObject (Level.text);

every update. Level contains a text asset which contains the JSON above.
I don't really get what I'm doing wrong here. Any ideas?

 

Hey. Yeah I'm trying to get litJson to deserialize arrays of arrays as well.
Have you found anything?

 

You owe me a beer.

https://github.com/lbv/litjson/commit/9a2605be3ba84da1f7505c6d26ca47b1987389f4