USER=*****&PWD=*****&VERSION=119.0&BUTTONSOURCE=AngellEYE_PHPClass&SIGNATURE=*****&METHOD=BMGetInventory&L_DIGITALDOWNLOADKEYS0=key1&L_DIGITALDOWNLOADKEYS1=key2&L_DIGITALDOWNLOADKEYS2=etc

Array
(
    [USER] => *****
    [PWD] => *****
    [VERSION] => 119.0
    [BUTTONSOURCE] => AngellEYE_PHPClass
    [SIGNATURE] => *****
    [METHOD] => BMGetInventory
    [L_DIGITALDOWNLOADKEYS0] => key1
    [L_DIGITALDOWNLOADKEYS1] => key2
    [L_DIGITALDOWNLOADKEYS2] => etc
)