curl --request POST \
  --url https://api.example.com/api/dashboard/collections/{collection_id}/products \
  --header 'Content-Type: application/json' \
  --data '
{
  "product_ids": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ]
}
'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "merchant_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "title": "<string>",
  "description": "<string>",
  "handle": "<string>",
  "type": "<string>",
  "image_url": "<string>",
  "sort_order": "<string>",
  "published": true,
  "published_at": "2023-11-07T05:31:56Z",
  "products_count": 123,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "products": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "merchant_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "slug": "<string>",
      "description": "<string>",
      "vendor": "<string>",
      "product_type": "<string>",
      "tags": [
        "<string>"
      ],
      "price": "<string>",
      "compare_at_price": "<string>",
      "cost_per_item": "<string>",
      "currency": "<string>",
      "images": [
        {}
      ],
      "has_variants": true,
      "options": [
        {}
      ],
      "variants": [
        {
          "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "product_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "sku": "<string>",
          "barcode": "<string>",
          "option1": "<string>",
          "option2": "<string>",
          "option3": "<string>",
          "price": "<string>",
          "compare_at_price": "<string>",
          "cost_per_item": "<string>",
          "inventory_quantity": 123,
          "inventory_policy": "<string>",
          "low_stock_threshold": 123,
          "weight": "<string>",
          "weight_unit": "<string>",
          "requires_shipping": true,
          "image_url": "<string>",
          "available": true,
          "is_low_stock": true,
          "is_out_of_stock": true,
          "created_at": "2023-11-07T05:31:56Z",
          "updated_at": "2023-11-07T05:31:56Z"
        }
      ],
      "track_inventory": true,
      "total_inventory": 123,
      "in_stock": true,
      "status": "<string>",
      "published_at": "2023-11-07T05:31:56Z",
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z"
    }
  ]
}