You are right, but I didn't know the names of the parameters at the time of writing. I can now see those from OP's reply so you could change the offending line to: 
my $in;
$in->{'name'} = $q->param('name');
$in->{'email'} = $q->param('email');
# etc

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In reply to Re^3: Read JSON data from a form by tangent
in thread Read JSON data from a form by Anonymous Monk

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