In the sample response you provided, features appears to be an array, you would need to access an item within that array (reference).
$context.response.data.features.0.type
$context.response.data.features.0.properties.areaDesc
$context.response.data.features.0.properties.geocode.UGC.0
$context.response.data.features.0.properties.event
Also note that you only need to use the HTTP action one time, then you can get each of the properties you want following that as the response stays available in the context variable until it’s overwritten (eg. another HTTP action).
