Reference layer in azure maps, custom json is invisible

Hi everyon

i've created a json file to use as a reference layer in an azure visual. if I Use it in a shape map I can see it with no problems but if I use it as a reference layer in an azure maps nothing happens. I wonder perhaps if this is due to the polygons dimensions... can somebody please help? thanks!

Here's an example of the json code

{
"type": "FeatureCollection",
"features": [
{ "type": "Feature", "properties": { "DRE": "50"}, "geometry": { "type": "Polygon", "coordinates": [ [ [+45.050000,+6.650000],[+45.060000,+6.650000],[+45.060000,+6.660000],[+45.050000,+6.660000] ] ] } },
{ "type": "Feature", "properties": { "DRE": "100"}, "geometry": { "type": "Polygon", "coordinates": [ [ [+45.040000, +6.660000],[+45.050000, +6.660000],[45.050000, 6.670000],[45.040000, 6.670000]] ] } }
]
}