OurMine has claimed to have hacked PlayStation's social media today, as well as claiming they got access to the PlayStation Network database. What that information they may have seen is unknown without further word from either Ourmine or Sony themselves. As of now, PlayStation's social media accounts have been restored to PlayStation's control.
OurMine is well-known for taking over social media of celebrities, companies, and other influential groups or people. They include an image similar to the above, claiming they have hacked that group or person, and they advertise their services to check security. In essence, they hack accounts to prove a security flaw and then offer their services to point out/fix that flaw.
The most worrying aspect of the news is that OurMine is claiming that the PlayStation Network database has leaked, they will leak it, or it has some potential to leak. Their message isn't clear, but it seems to indicate that the PlayStation Network may have been compromised. It may be in your best interest to remove some personal information from your PlayStation Network account and monitor in the coming future for anything fishy.
As of yet, there has not been any word from Sony on the issue about a confirmed leak or that its customers and users should take care, but it is likely better to be safe than sorry at this point. Also, it's worth mentioning this would not be the first time Sony has had its databases hacked.
Back in July of 2016, OurMine hacked the Niantic CEO, which didn't result in anything for Pokemon GO users to worry about. In January of 2016, they hacked Markiplier and leaked personal and some sensitive information using what was believed to be an exploit in the Youtube MCN Dashboard. However, this case is slightly different in that previously they haven't mentioned anything about databases, which could create much more damage.
If Sony mentions anything about the breach, we will update this article with the relevant information.