JSON ENCRYPTED POST DATA

Wassup gs hope all doin fine in here I’m new joined today i need help on how to make config of site that has post data encrypted I’m totally newbie in encryptions i could just create basic configs so trying to learn.
So the post data of site like this

n: best.free.xvpn.SignInAction
json: {“A”:2,“N”:“oNyS9Xcrn4FDHBC_0_r2uw”,“D”:“gWPBkTd0zQiR_tBnidZKq3_hbL2iNWU-um4eAbBC8yVo9dn6YaIu7JdWKelogVF5vcCe05C2ra4fv1FOZJGA6w0e8mzpjjB6NyIuum_RXAyrquZP0LEmhojSm_1W4A”}

Could someone help any answer or help would be appreciation thanks guyz

It’s not a cracking forum!