Country : JP

My Question or Issue

When I call the "Get a track" API from the Spotify Console (https://developer.spotify.com/console/get-track/), it returns a preview_url correctly.
However, when I copy the curl command shown in the Spotify Console and run it in the terminal on my PC, the preview_url is null for some songs.

Example curl command is 
```
curl -X "GET" "https://api.spotify.com/v1/tracks/44Ljlpy44mHvLJxcYUvTK0?market=JP" -H "Accept: application/json" -H "Content-Type: application/json" -H "Authorization: Bearer XXX"
```

The token I used in the above curl request is the token I got from our service using User Authorization.
When we used the token we got from "OAuth Token > GET TOKEN" in the Spotify Console, we were able to get the preview_url correctly with the curl command.

Are there any restrictions based on the access  region, or are there access restrictions for each token?
I would like to know the cause of not being able to get the preview_url.

Thanks!