{
   "tracks" : [
      {
         "chunkSize" : 20000,
         "category": "Reference sequence",
         "urlTemplate" : "seq/{refseq}/",
         "type" : "SequenceTrack",
         "seqType": "dna",
         "label" : "DNA",
         "key" : "Reference sequence",
         "storeClass": "JBrowse/Store/Sequence/StaticChunked",
         "foo": "bar"
      }
   ],
   "formatVersion" : 1
}