my $JSON = $LayoutObject->BuildSelectionJSON(
    [
        {
            Data          => $ArrayRef,      # use $HashRef, $ArrayRef or $ArrayHashRef (see below)
            Name          => 'TheName',      # name of element
            SelectedID    => [1, 5, 3],      # (optional) use integer or arrayref (unable to use with ArrayHashRef)
            SelectedValue => 'test',         # (optional) use string or arrayref (unable to use with ArrayHashRef)
            Sort          => 'NumericValue', # (optional) (AlphanumericValue|NumericValue|AlphanumericKey|NumericKey|TreeView) unable to use with ArrayHashRef
            SortReverse   => 0,              # (optional) reverse the list
            Translation   => 1,              # (optional) default 1 (0|1) translate value
            PossibleNone  => 0,              # (optional) default 0 (0|1) add a leading empty selection
            Max => 100,                      # (optional) default 100 max size of the shown value
        },
        {
            # ...
        }
    ]
);