Most of what your APO returns make little or no sense: 

,”suburb”:”Venezia-Murano-Burano”,”city”:”Mestre”,”county”:”Venezia”,”ISO3166-2-lvl6″:”IT-VE”,”state”:”Veneto”,”ISO3166-2-lvl4″:”IT-34″,”postcode”:”30135″,”country”:”Italy”

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enezia-Murano-Burano are not Suburbs of Mestre. Rather Burano, Murano, and Mestre are suburbs of Venezia (Venice).

There are no counties in Italy, rather there are provinces and indeed Venezia is a Province as well.
There are no States in Italy, rather there are Regions and Veneto is the correct region..