curl --request GET \
  --url https://api.neynar.com/v2/farcaster/frame/notification_tokens/ \
  --header 'x-api-key: <api-key>'

{
  "next": {
    "cursor": "<string>"
  },
  "notification_tokens": [
    {
      "created_at": "2023-11-07T05:31:56Z",
      "fid": 3,
      "object": "notification_token",
      "status": "enabled",
      "token": "<string>",
      "updated_at": "2023-11-07T05:31:56Z",
      "url": "<string>"
    }
  ]
}