curl --request POST \
  --url https://api.example.com/v1/shared/bag/{uuid}/products/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "product": 123,
  "count": 1073741823
}
'

{
  "id": 123,
  "product": 123,
  "discount": 123,
  "count": 1073741823
}