let params =
[{
    filterType: "shadow",
    filterId: "myShadow",
    rotation: 35,
    blur: 2,
    quality: 2,
    distance: 12,
    alpha: 0.65,
    padding: 100,
    shadowOnly: false,
    color: 0x000000,
    zOrder: 5,
}];

await TokenMagic.addUpdateFiltersOnSelected(params);

//Remember Token Magic FX enabled and this macro run as a script. This is just an edited version of an existing drop-shadow macro available with the module. But this one doesn't jitter.