POST comment reactions | Is emoji a body parameter or query parameter

At a guide for comment reactions REST API (, I’m supposed to send the emoji string as a body parameter but the test cURL command showed me that the URL looks like

curl -X POST -H 'X-FIGMA-TOKEN: <personal access token>' 

Then, do I need to send it over as a query parameter?
How can I post the emoji for this API?

It should be a request body parameter. The test curl is being generated incorrectly.