GeoJson Zone Set mix LineString and Multipolygon

Is it possible to create a zone set that includes a LineString and Multipolygon in the features list? I receive an error "The system had trouble reading your geojson." I am able to create zone sets on insight mixing lines and polygons and then use these in analysis.

Alternatively, can I create a polygon zone set and then append a linestring zone to it using the API?