How to convert NBS files?

Im making an in game NBS using the Iron Noteblock from Tobit's MoarPeripherals. And I can't seem to understand how to convert saved data files to NBS. The data files are in this format :

addedKeys = {
  {
    instrument = "Piano/Harp",
    key = 3,
    octave = 1,
    page = 1,
    pos = 11,
  },
  {
    instrument = "Piano/Harp",
    key = 9,
    octave = 1,
    page = 1,
    pos = 18,
  },
  {
    instrument = "Piano/Harp",
    key = 11,
    octave = 1,
    page = 1,
    pos = 33,
  },
  {
    instrument = "Piano/Harp",
    key = 5,
    octave = 1,
    page = 1,
    pos = 33,
  },
  {
    instrument = "Piano/Harp",
    key = 3,
    octave = 1,
    page = 1,
    pos = 23,
  },
  {
    instrument = "Piano/Harp",
    key = 6,
    octave = 1,
    page = 1,
    pos = 19,
  },
}

If anyone has knowledge on how to do so, please help

I can tell you that the specification is here. Bear in mind that you'll need a basic understanding of how data types relate to memory usage in order to actually do anything with that information - I suggest reading through BIT's NBS reading code in the Note player for some pointers.

You'll definitely have to understand Endianess and how to convert between the two as Java's IO is big endian, and the NBS format is little endian.