Overall it's consistent and readable, but for minor nit picks I choose this line:

   print redirect($scripts->{'musing'}->{'script'}
                  . '?musing_id=' . $musing_id);
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Drop unnecessary quoting of hash keys, prefer interpolation to dot concatenation. This, less noisy:

   print redirect("$scripts->{musing}{script}?musing_id=$musing_id");
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