I created an FME workspace that reads your file. See attachment.
I read the text-file with a Text File Reader and the parameter 'Read Whole File at Once' set to 'Yes'. Next I used a JSONFragmenter to get the separate features. Finally I used a GeometryReplacer to create the geometries.
I created the workspace with the version 2017.1.2.1
read-geojson.fmw
Hi @fkemminje, the "JSONResult" object in the document is basically conforming to GeoJSON feature collection format, but each feature object doesn't have "type" member (value is "Feature") unfortunately.
If you insert "type" member to every feature, you can ten convert them to individual features having geometry and attributes with the JSONFragmenter.