Smartthing API, Washer Capabilities, Washer Command, Send Command to device

Hello Everyone,

I’m facing an issue in post device command API. It is always returning the {“status”:“ACCEPTED”} for all commands. Also on cloud where we can check the logs of commands send by the APIs.

I’m using Oauth to generate tokens. All other APIs are working fine.

Please guide me what I’m doing wrong here.

Also please provide documentation of washer capabilities, commands and it’s value if anyone have that.
Kind Regards
Meenakshi