2021 - Creating a keystore for Google Play Publishing with GameSalad
Step 1: Paste this in Terminal:
keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -keyalg RSA -sigalg SHA1withRSA -keysize 2048 -validity 10000
Step 2: EDIT THE FOLLOWING: my-release-key (put your name or company name) and alias_name (you can put the same as your name or company name)