After converting your JSON to perl...

#!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11137065
use warnings;

my $DATA = {
  required => [
    { docs => [{ number => 1, sec => "123A" }], name => "Mary Lou" },
    { docs => [{ number => 1, sec => 4567 }], name => "John De" },
    { docs => [{ number => 1, sec => 8763 }], name => "Smith Doe" },
    { docs => [{ number => 1, sec => "123B" }], name => "Joe De" },
  ],
};

for my $dta ( @{ $DATA->{required} } )
  {
  my $sec    = $dta->{docs}[0]{sec};
  my $number = $dta->{docs}[0]{number};
  my $name   = $dta->{name};
  print <<END;
"sec": "$sec",
"number": "$number"
"name": "$name"

END
  }
[download]

Outputs

"sec": "123A",
"number": "1"
"name": "Mary Lou"

"sec": "4567",
"number": "1"
"name": "John De"

"sec": "8763",
"number": "1"
"name": "Smith Doe"

"sec": "123B",
"number": "1"
"name": "Joe De"
[download]