AutoTools Cant Parse Json Data

I'm having an issue with the JSON Read action. At a high level, the following is my use case:

1. Get current location
2. Use the latitude and longitude to pull the weather forecast from WeatherUnderground.

AutoLocation does a fine job of retrieving my current location. I then write some of the location data to a JSON using AutoTools, JSON Write. The resulting JSON looks like this:

{
"altitude": "Not Reported",
"bearing": "N/A",
"latitude": "39.7685116",
"speed": "N/A",
"time": "1:30 PM",
"longitude": "-105.0208127"
}​

In another task, I attempt to read the latitude and longitude out of the above JSON using AutoTools. However, I get the following error:

14.21.24/ActionArgBundle key: SortArrayKey: replace <null> String value with null
14.21.24/ActionArgBundle key: JsonRootVariable: replace <null> String value with null

14.21.24/ActionArgBundle key: SortArrayObjectKey: replace <null> String value with null

14.21.24/ActionArgBundle key: MatchField: replace <null> String value with null

14.21.24/ActionArgBundle key: MatchValue: replace <null> String value with null

14.21.24/ActionArgBundle key: VariableName: replace <null> String value with null

14.21.24/ActionArgBundle key: MaxResults: replace <null> String value with null

14.21.24/ActionArgBundle key: Max: replace <null> String value with null

14.21.24/ActionArgBundle key: Min: replace <null> String value with null

14.21.24/ActionArgBundle key: Sum: replace <null> String value with null

14.21.24/ActionArgBundle key: Query: replace <null> String value with null

14.21.24/ActionArgBundle key: InputFormat: replace <null> String value with null

14.21.24/ActionArgBundle key: JoinOutputArray: replace <null> String value with null

14.21.24/ActionArgBundle key: Average: replace <null> String value with null

14.21.24/E FIRE PLUGIN: AutoTools Json Read / com.twofortyfouram.locale.intent.action.FIRE_SETTING: 29 bundle keys

14.21.24/E AutoTools Json Read: plugin comp: com.joaomgcd.autotools/com.joaomgcd.autotools.broadcastreceiver.BroadcastReceiverFire

14.21.24/E add wait type Plugin2 time 60
14.21.24/E add wait type Plugin2 done​

The %err and %errmsg variables contain -

1732149406
Input is not valid JSON data: A JSONArray text must start with '[' at 1 [character 2 line 1]​

I'm stuck. The JSON validates as having the correct structure. Where do I go from here?