Invalid request

[leoapertum]

I'm trying the API for the first time. I have created a request that is almost identical to the one in the docs:

{
"lat": 49.809,
"lon": 16.787,
"model": "gfs",
"parameters": ["wind", "dewpoint", "rh", "pressure"],
"levels": ["surface"],
"key": "Gk7LmFfd9aULH1vZd3XvwN9cvdCTBool"
}

When posting this to the API with curl:

curl --data-binary @fetch.json https://api.windy.com/api/point-forecast/v2

I'm getting "Invalid request - "key", "model", "lat", "lon" or "parameters" are missing." as the response.

Can anyone spot the problem?