$account->{transactions} = \{get_transactions($account->{transactions_id})};

##</code><code>##

>perl -MData::Dumper -wle "warn Dumper \{ foo => bar }; warn Dumper { foo => bar }"
Unquoted string "bar" may clash with future reserved word at -e line 1.
Unquoted string "bar" may clash with future reserved word at -e line 1.
$VAR1 = \{
            'foo' => 'bar'
          };
$VAR1 = {
          'foo' => 'bar'
        };