Json with zeros connecting problem

entries: [{mediaGroups: [{,…}], title: "Podcast of", link: "",…},…]
     [0 … 99]
         0: {mediaGroups: [{,…}], title: "Podcast of", link: "",…}
            author: "charles"
            categories: []
            content: primeira entrevista do podcast ..."
            link: ""
            mediaGroups: [{,…}]
               0: {,…}
                  contents: [{url: "http://www..example.mp3", fileSize: "10000"}]
                       0: {url: "http://http://www.example.mp3", fileSize: "10000"}
                           fileSize: "10000"
                           url: "http://www.example.mp3"
              publishedDate: "Thu, 14 Jan 2016 07:10:42 -0800"
              title: "1º Podcast tyest"

i'm trying to parse this, but these zeros in the middle don't work

{{post.title}}

{{ post.mediaGroups}}

{{ post.mediaGroups.contents }}

{{ post.mediaGroups.0.contents}}

the problem is inside the mediagroups array with that zeros
any idea to help?