Sort:  

The problem was I wasn't converting the operation id (39) to hex.

what encoding are you using and how do you sign your transaction?

I'm encoding the strings with UTF-8 and using my own Java lib for signing.

Thanks for stopping by @bennierex and trying to help a nerd in distress :)

Glad you figured it out!

Coin Marketplace

STEEM 0.06
TRX 0.28
JST 0.048
BTC 68113.02
ETH 1976.38
USDT 1.00
SBD 0.50