var original = {
  email: {
    0: '[email protected]',
    1: '[email protected]',
    2: '[email protected]'
  },
  name: {
    0: 'Sam',
    1: 'Jack',
    2: 'Lucy'
  },
  last_name: {
    0: 'Smith',
    1: 'Green',
    2: 'Tompson'
  }
};

var expected = [
  {
    email: '[email protected]',
    name: 'Sam',
    last_name: 'Smith'
  },
  {
    email: '[email protected]',
    name: 'Jack',
    last_name: 'Green'
  },
  {
    email: '[email protected]',
    name: 'Lucy',
    last_name: 'Tompson'
  }
];