Hello, I'm posting here what I did at that time, maybe it becomes handy to someone..:

    share $shash{$dthread}{'go'};
    $shash{$dthread}{'go'} = 0;

    share $shash{$dthread}{'data'}->{'first_key'};
    $shash{$dthread}{'data'}->{'first_key'} = '';
  
    share $shash{$dthread}{'data'}->{'second_key'};
    $shash{$dthread}{'data'}->{'second_key'} = '';
  
    share $shash{$dthread}{'data'}->{'third_key'};
    $shash{$dthread}{'data'}->{'third_key'} = '';
  
    share $shash{$dthread}{'pid'};
    $shash{$dthread}{'pid'} = -1;
  
    share $shash{$dthread}{'die'};
    $shash{$dthread}{'die'} = 0;
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In such case $shash{$dthread}{'data'} becomes a key-value hash. Thank you!