apiKey: ********************{
"audioUrl": "https://example.com/audio.mp3"
}curl --location --request POST '/api/audio/duration' \
--header 'apiKey: <api-key>' \
--header 'Content-Type: application/json' \
--data-raw '{
"audioUrl": "https://example.com/audio.mp3"
}'{
"errorMessage": "string",
"code": 0,
"aboutUrl": "string",
"traceId": "string",
"duration": 120.5
}