Here is 1 saying encoded using a letter for letter replacement:

P GFJMOD ZQ P GFJMOD ZQ P GFJMOD. EXDL NPU SPZUE EXD YPIIQ YZEX PMMJDQQZRDIL
NXDDJTOI SJZGPJL NFIFJQ PUB QSIPQXL KFIB MJPSXZNQ, KOE ZE'Q QEZII P XFIBZUM
SIPND TFJ EXD BDPB OUEZI EXDL NPU KD SPJEDB FOE EF FJMPU KPUWQ. UFE EXPE Z
YFOIB XPRD NPJDB UFJGPIIL KOE GL RZDYSFZUE YPQ QWDYDB. EXD JDIDUEIDQQ
SIDPQPUND FT EXD JFFG Z QPE ZU QDDGDB FUIL MJFEDQAOD.
-- SPE NPBZMPU, "GZUBSIPLDJQ"