       7   6   5   4   3   2   1   0   7   6   5   4   3   2   1   0   7   6   5   4   3   2   1   0   7   6   5   4   3   2   1   0
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0000 | Message size (chars)          | Message text, 40 x 16bit unicode, little endian                                            ...                                                                                  ...
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
0050  ...                            |
     +---+---+---+---+---+---+---+---+
