The template seems to be right, are you sure about the parameters?
If in doubt about any parameter to be sent, I used this technique to clone the original: I suggest you generate the real signal by pointing it at OMG and see what the RF receiver captures in the 433toMqtt topic
I used this technique to copy the original signal, get full signal raw data and also capture the exact delay to use.
After that (in my case I want to manage it via HA) I created a fake device via automation and injected it via MQTT discovery (check out the second script on Problem understanding HA integration - #3 by odyno) and finally I have a device full managed without any compatibility problem.
Hope is useful for you.