SectionInsert

db.Page.insert({
  name : 'page-X',
  title : 'Title Here',
  sections : [
  {
    name : 'hero-1',
    content : 'all content here blah blah'
  },
  {
    name : 'hero-2,
    content : 'moiasifohasfihafola'
  }
  ]
}, function(err, page) {
  if(err)
    throw err
  else
    doSomething(page)
});

SectionLoop

for(var x in pageData.sections) {
  pageData.sections[x] = x;
}