curl --request PUT \
  --url https://api.journeybee.io/v1/deals/{uuid}/custom-fields \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "custom_field_uuid": "<string>",
  "value": {
    "text": "<string>",
    "number": 123,
    "date": "<string>",
    "boolean": true,
    "select": 123,
    "multi_select": [
      123
    ]
  }
}
'

{
  "uuid": "<string>",
  "label": "<string>",
  "value": {
    "text": "<string>",
    "number": 123,
    "date": "<string>",
    "boolean": true,
    "select": 123,
    "multi_select": [
      123
    ]
  },
  "options": [
    {
      "id": 123,
      "label": "<string>"
    }
  ]
}