I’m tagging @eptak here as well as I suspect he’s best positioned to answer this question about what the format of an LPP downlink payload should look like.
My understanding is that a digital actuator payload coming IN (so uplink) to Cayenne via LPP should look like this (using an example of channel 5):
050100 would decode as:
"name": "Digital Output (5)"
However, I’m not sure what it looks like going in the other (downlink) direction, which is I think where he can help. Thanks for your patience, I think we can both learn something here