Yes.
You should read the docs - the "node-red cookbook HTTP request" has examples you can work through to get a better understanding
Also, be sure to read the built in help (on the RH sidebar) for the HTTP Request node (it will explain much of what is inside the function I wrote for you)
Here is a demo to get you started....
The flow (use CTRL+I to import)...
[{"id":"2a513db0f9657f02","type":"inject","z":"cf45249a93d7b57a","name":"Click me","props":[],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","x":600,"y":260,"wires":[["2a513db0f9657f03"]]},{"id":"2a513db0f9657f03","type":"function","z":"cf45249a93d7b57a","name":"Prep headers, method, url","func":"//original curl: \n//\n//curl -X 'POST' 'http://192.168.1.1/broadcast/control' -H 'accept: */*' -H 'Content-Type: application/json' -d '{\"switchable\": false}'\n\nmsg.method = \"post\";\nmsg.url = \"http://192.168.1.1/broadcast/control\";\nmsg.payload = {\n \"switchable\": false\n};\nmsg.headers = {\n \"accept\": \"*/*\",\n \"Content-Type\": \"application/json\"\n};\nmsg.cookies = null;\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":830,"y":260,"wires":[["2a513db0f9657f04"]]},{"id":"2a513db0f9657f04","type":"http request","z":"cf45249a93d7b57a","name":"","method":"use","ret":"txt","paytoqs":"ignore","url":"","tls":"","persist":false,"proxy":"","authType":"","x":710,"y":320,"wires":[["2a513db0f9657f05"]]},{"id":"2a513db0f9657f05","type":"debug","z":"cf45249a93d7b57a","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":930,"y":320,"wires":[]}]
NOTE: untested (i dont have your device)