curl --request POST \
  --url https://sdk-api.playcamp.io/v1/server/webview/ott \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "userId": "<string>",
  "campaignId": "<string>",
  "codeChallenge": "<string>",
  "callbackId": "<string>",
  "metadata": {}
}
'

{
  "data": {
    "ott": "<string>",
    "expiresIn": 123
  }
}