What is this unnamed account which shows up as being signed in?

[timkamat]

While going through the settings on my Galaxy S3, I found a strange entry for an unknown account. It can't be identified as it's blank. But issue is that I can't sign out or unregister it.
Please help me on how to remove this account. How shall I identify what this account for?

 

[timkamat]

I am referring to the one after Samsung Account which is blank and marked green