I don't know how to deserialize this json string:
[ [ [ "JR10", "Test1", 142, 199, 66 ], [ "JR10", "Test2", 142, 199, 66 ] ] ]
into an array inside an array.
for example:
messages[0] would contain an array containing "JR10", "Test1", 142, 199, 66
messages[0][0] would contain the string "JR10"