Yes, because `curl -v -d "eceipt_type=ok&manifest_url=http://6ea60555-e8c8-5648-b04a-0da73138abf9.simulator" https://marketplace.firefox.com/api/v1/receipts/test/` yields:

`{"error_message": {"receipt_type": ["This field is required."]}}`

and `curl -v -d "receipt_type=ok&manifest_url=httpk://6ea60555-e8c8-5648-b04a-0da73138abf9.simulator" https://marketplace.firefox.com/api/v1/receipts/test/` yields:

`{"error_message": {"manifest_url": ["Enter a valid URL."]}}`

and `curl -v -d '' https://marketplace.firefox.com/api/v1/receipts/test/` yields:

`{"error_message": {"manifest_url": ["This field is required."], "receipt_type": ["This field is required."]}}`

Thoughts? @mykmelez