Hash entries need keys. If you don't want keys, you have an array (or array reference). This might do what you want (for some value of want):

$VAR1 = [ # changed '{' to '['
         { 
               'x' => '13', 
               'y' => '2', 
               'z' => '41', 
         }, 
         { 
               'x' => '6', 
               'y' => '6', 
               'z' => '22' 
         } 
] # changed '}' to ']'
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