Update Product Assets

curl --request PUT \
  --url https://server26-dot-royalti-project.uc.r.appspot.com/product/{id}/assets \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "assets": [
    {
      "asset": "asset-id-1",
      "number": 1
    },
    {
      "asset": "asset-id-2",
      "number": 2
    }
  ]
}'

{
  "message": "Assets added to Products"
}