That’s below our requirements but we’ve had success running on similar specs as that. I’m not advocating you should buy it based on my previous statement though. 
I would recommend upgrading your system. If you’re really eager, you could subscribe and if it doesn’t run, just cancel your account.
SYSTEM REQUIREMENTS:
Desktop PC or Mac
Windows 7 64-bit or Mac OS X 10.9.2 or later
Quad-core Intel or AMD processor, 2.5 GHz or faster
NVIDIA GeForce 470 GTX or AMD Radeon 6870 HD series card or higher
8 GB RAM