You could use a hash-of-hashes data structure (perldsc)

use warnings;
use strict;

my %data;
while (<DATA>) {
    chomp;
    my @tokens = split /,/;
    my %hash;
    $hash{symbol    } = $tokens[0];
    $hash{timeStamp } = $tokens[2];
    $hash{status    } = $tokens[3];
    $hash{bid       } = $tokens[4];
    $hash{bidVol    } = $tokens[5];
    $hash{ask       } = $tokens[6];
    $hash{askVol    } = $tokens[7];
    $data{$tokens[1]} = \%hash;
}

use Data::Dumper;
$Data::Dumper::Sortkeys=1;
print Dumper(\%data);


# FILE1:
__DATA__
ESM3,2285319,Q,13:58:50.744000,Q,WIDE,1549.250000,656,1549.500000,522,
+0.000000,0.000000,0.000000,105,67,N,CME,CME
ESM3,2285247,T,13:58:49.986000,SELL,1549.250000,2,0,1738560,,U
ESM3,2285320,Q,13:58:50.749000,Q,WIDE,1549.250000,656,1549.500000,524,
+0.000000,0.000000,0.000000,105,68,N,CME,CME
ESM3,2285321,Q,13:58:50.750000,Q,WIDE,1549.250000,655,1549.500000,524,
+0.000000,0.000000,0.000000,104,68,N,CME,CME
ESM3,2285325,Q,13:58:50.801000,Q,WIDE,1549.250000,655,1549.500000,522,
+0.000000,0.000000,0.000000,104,67,N,CME,CME
ESM3,2285326,Q,13:58:50.802000,Q,WIDE,1549.250000,656,1549.500000,522,
+0.000000,0.000000,0.000000,105,67,N,CME,CME
ESM3,2285328,Q,13:58:50.831000,Q,WIDE,1549.250000,667,1549.500000,522,
+0.000000,0.000000,0.000000,106,67,N,CME,CME
ESM3,2285329,Q,13:58:50.832000,Q,WIDE,1549.250000,1504,1549.500000,522
+,0.000000,0.000000,0.000000,107,67,N,CME,CME
ESM3,2285330,Q,13:58:50.833000,Q,WIDE,1549.250000,1505,1549.500000,522
+,0.000000,0.000000,0.000000,108,67,N,CME,CME
ESM3,2285331,Q,13:58:50.833000,Q,WIDE,1549.250000,1506,1549.500000,522
+,0.000000,0.000000,0.000000,109,67,N,CME,CME
ESM3,2285332,Q,13:58:50.833000,Q,WIDE,1549.250000,1506,1549.500000,520
+,0.000000,0.000000,0.000000,109,66,N,CME,CME
ESM3,2285333,Q,13:58:50.833000,Q,WIDE,1549.250000,1506,1549.500000,519
+,0.000000,0.000000,0.000000,109,65,N,CME,CME
ESM3,2285334,Q,13:58:50.833000,Q,WIDE,1549.250000,1507,1549.500000,519
+,0.000000,0.000000,0.000000,110,65,N,CME,CME
[download]

Here's a snippet of the output:

$VAR1 = {
          '2285247' => {
                         'ask' => '2',
                         'askVol' => '0',
                         'bid' => 'SELL',
                         'bidVol' => '1549.250000',
                         'status' => '13:58:49.986000',
                         'symbol' => 'ESM3',
                         'timeStamp' => 'T'
                       },
          '2285319' => {
                         'ask' => '1549.250000',
                         'askVol' => '656',
                         'bid' => 'Q',
                         'bidVol' => 'WIDE',
                         'status' => '13:58:50.744000',
                         'symbol' => 'ESM3',
                         'timeStamp' => 'Q'
                       },
[download]

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