[search api/lookup api] Is there an updateDate field to accompany releaseDate?

I'm using the lookup API to retrieve app information from the App Store (example: https://itunes.apple.com/lookup?id=284910350). I see a value releaseDate but no value for updateDate or similar that would contain the date when the app was last updated as visible in the App Store on the left (example: https://itunes.apple.com/us/app/yelp/id284910350). Is there a different official Apple API that I can use that would have this information or another method to retrieve the last updated date with all the other information that the lookup API provides?

Thank you in advance!