Create assets

curl --request POST \
  --url https://v2.firstpromoter.com/api/v2/company/assets \
  --header 'Account-ID: <account-id>' \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "name": "<string>",
  "asset_type": "image",
  "url": "<string>",
  "category_id": 123,
  "allowed_campaign_ids": [
    123
  ],
  "content": "<string>",
  "landing_page_url": "<string>"
}'

{
  "id": 123,
  "name": "<string>",
  "allowed_campaign_ids": [
    123
  ],
  "details": {
    "file_format": "<string>",
    "file_size": 123,
    "image_size": {
      "width": 123,
      "height": 123
    }
  },
  "content": "<string>",
  "landing_page_url": "<string>",
  "asset_type": "image",
  "url": "<string>",
  "thumbnail_url": "<string>",
  "uploading": true,
  "category": {
    "id": 123,
    "name": "<string>",
    "position": 123
  },
  "allowed_campaigns": [
    {
      "id": 123,
      "name": "<string>",
      "color": "<string>"
    }
  ]
}