{
   "db.test": {
      "escCollection": "fle2.test.esc",
      "eccCollection": "fle2.test.ecc",
      "ecocCollection": "fle2.test.ecoc",
      "fields": [
         {
            "keyId": {
               "$binary": {
                  "base64": "EjRWeBI0mHYSNBI0VniQEg==",
                  "subType": "04"
               }
            },
            "path": "encrypted",
            "bsonType": "long",
            "queries": {
               "queryType": "rangePreview",
               "contention": {
                  "$numberInt": "0"
               },
               "sparsity": {
                  "$numberInt": "1"
               }
            }
         }
      ]
   }
}