moment.tz.pack(UnpackedObject); // PackedString

This converts data in the unpacked format to the packed format.

var unpacked = {
    name       : 'Indian/Mauritius',
    abbrs      : ['LMT', 'MUT', 'MUST', 'MUT', 'MUST', 'MUT'],
    offsets    : [-230, -240, -300, -240, -300, -240],
    untils     : [-1988164200000, 403041600000, 417034800000, 1224972000000, 1238274000000, null],
    population : 150000
};
moment.tz.pack(unpacked); // "Indian/Mauritius|LMT MUT MUST|-3O -40 -50|012121|-2xorO 34unO 14L0 12kr0 11z0|15e4"