You need to serialize your data somehow.

Serializatoin means taking your native, in memory, possibly broken up in 30 different ways in memory, to a single, encoded format that represents what was in memory. That format can be brought back deserialized back to the native format. Some of the ponters will be different, but the structure will return.

Simplest way? It may be yaml, though I've heard a few complaints about it. It could be storable. Play with it. I'm sure you'll find a module or format that you find simple. Heck, if you are sending only arrays, CSV format may be easiest.