I already send to them my signature, so what will happen to next?, please help me out or tell me what next?
Maybe you can say goodbye to your coins. This is the problem when most people want to join in the airdrops that they are not aware of the information that they will give. They just give any information that the airdrop needs just to get FREE money. I'm not saying its bad to join to airdrops but read the requirements first before you join.
I signed up for the airdrop but when i took a good look at that fake MEW site i was already very suspicious because the url and certificate didn't match the real MEW site and there are a bunch of missing wallet access options on the sign message page. But I could see how an unsuspecting user not using a hardware wallet or paying attention to all the red flags could end up giving these scammers their private keys.