First of all, thats probably a SHA-2 384bit hash. SHA-2 512 would have to be longer.
Second of all, no one is going to crack the hash for you.
If the text that was hashed is very short and no salt was used, then you could probably crack it pretty fast, if you have a good GPU card (forget cracking long hashes with a cpu).
Currently there are no "clever ways" to crack SHA-2 fast, so you are stuck with brute force. You could use dictionary attacks too, but that only makes sense if no salt was used to hash the text.
If the hashed string was long, had special chars and salt was used, you are screwed. Wouldn't crack it in a million years.
