AES Decryption HAProxy

I am trying to use the inbuilt aes_gsm_dec to decode one of the headers which is aes encrypted from the go lang library crypto/aes (sample eg)

However, the GoLang library returns a hex-encoded string.
I don’t see any examples other than base 64 string.

I don’t want to add lua scripts here and try and minimize work. How can I extract the NoOnce and cipher text from the hex encoded string