Ruby create hash with array of hashes

gistfile1.txt

      d = {
        "data_format"                          => 'contact',
        "data_type"                            => 'json',
        "action_type"                          => 'create',
        "data"                                 => [{
          "id" => "123",
          "first_name" => "Pete",
          "last_name" => "Brum"
        }],
      }