You can have a hash of hashes, like this:

Alpha 
   count   => 37
   arr     => {0,0,4,26,0,7}

Beta 
   count  => 40
   arr    => {1,38,0,0,0,1}

Gamma 
   count  => 3
   arr     => {1,1,0,0,0,1}
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And you assing it like this:

$hash{Alpha}={count=>37, arr=>[0,0,4,26,0,7]};
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