curl --request POST \
  --url https://api.oquiz.net/users/self/banners \
  --header 'Content-Type: application/json' \
  --data '
{
  "slot": "<unknown>",
  "payload": {
    "type": "<unknown>",
    "value": "<string>",
    "color": "<string>"
  },
  "current": true,
  "position": 123
}
'

{
  "id": "<string>",
  "createdAt": "2023-11-07T05:31:56Z",
  "updatedAt": "2023-11-07T05:31:56Z",
  "userId": "<string>",
  "position": 123,
  "payload": {
    "type": "<unknown>",
    "value": "<string>",
    "color": "<string>"
  },
  "slot": "<unknown>",
  "current": true
}