This is what I've read in the WWE2k19 forums. They say it works, but I haven't tried yet.
uploader instructions
1. insert a flashdrive to your ps4/xbox, go into your ps4/xbox settings and copy your wwe 2k save file from internal storage to flash drive. it will only take a couple of minutes since you are coping just one save.
2. take flashdrive and stick it into your computer, only done this on windows. access the drive on windows and copy the whole ps4/xbox folder to whatever site host you want, i use google drive since it is free, once it is uploaded that is it for the process, you just need to give out/post the link to download it.
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downloader instructions
1. insert a flashdrive to your computer access the flashdrive.
2. download the hosted save file to your desktop or wherever is easy for you, once downloaded, copy it over to your flashdrive.
3. insert flashdrive to your game system and copy the contents of the flashdrive to your internal storage in your settings.
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WARNING.... this process will overight your save, you will lose any CAWs you downloaded or progress in modes. with the same process make a back up copy of your save in case you want it back, just save it to your computer, titles original or whatever. as far as i know right now there isn't a way to nitpick what is the save file you want to change.