ZenHAX

Ok so I'm trying to figure out how Zen Pinball renames the tables downloaded from their servers after payment/restoration (downloads PXP as metadata, reads it for information to inform the user on the filesize, then gets the PXP.REAL and changes its extension to PXP). Its 30 digits (numbers and lowercase letters) of most likely an unknown hash. Can someone figure it out?

Example of PXP (metadata, JSON):

REGION: Server region (US [North America, 1-2] OR EU [Europe, 1-9])
#: CDN number.
PLAT: Platform (android_yap [Google Play], amazon_bueller_yap (Amazon Fire TV) , iOS_yap (iOS) or amazon_yap (Amazon).
DLCTYPE: DLC or DLC_SD
TABLE: Internal table name (cit.pxp, NOT DLC, just an example).
BASE64: Base64 encoded hash?

{
  "size": SIZEINBYTES,
  "mediaLink": "http://REGION0#.zenstudios.com/PLAT/DLCTYPE/TABLE.pxp.real",
  "pxfingerprint": "BASE64="
}

Game names the file 30 unknown characters and creates a META file with the pxfingerprint data from the metadata PXP file, after the game dl's the true PXP, the meta file is deleted.

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Hacking Angry Birds since 2016