Decrypt Signature

Questions
1

How can I decrypt this value?
signature=m7sxEOcIEK3WXOu6k/izkTdHQ4eU+MFoK4/tuVoSLi0=

2

This string is included in the following content:

AuthTokenAuthorization: PLAYAUTH1.0 x=ApiKey=43C83C944B064B52AF360DCF93328766, SignatureType=Utf8_SHA256, RequestTime=2022-09-02T10:44:59.7Z, DeviceId=0432e0e429ca43deb8bd53be36584437, AllowAuthNOnly=true, PlatformType=AndroidMobile, PlatformVersion=samsung[SM-G955N[universal8895]], PlatformOsType=Android, PlatformOsVersion=22, AppVersion=4.16.0[2913], signature=m7sxEOcIEK3WXOu6k/izkTdHQ4eU+MFoK4/tuVoSLi0=