my %HOH = {};
 
 %hash1 = (
        key1 => 'value1',
        key2 => 'value2',
        key3 => 'value3',
    );

  %hash2 = (
        key1 => 'value1',
        key2 => 'value2',
        key3 => 'value3',
    );

  $HOH{'1'} = %hash1;
  $HOH{'2'} = %hash2;