curl --location 'https://base.merchantwarrior.com/post' \
--header 'MW-API-VERSION: 2.0' \
--header 'MW-MESSAGEHASH: 9ae6750528916c7a6acc249b605f5a54a2c03afd63e436a1d2818440d56540fc' \
--header 'Content-Type: application/json' \
--data '{
"method": "deregisterPOS",
"merchantUUID": "123456789abcd",
"apiKey": "1a3b5c",
"posID": "5612478"
}'