curl --request POST \
  --url https://api.sprucecollective.co.uk/admin/webflow/process-submission \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "date_submitted": "<string>",
  "email": "<string>",
  "matched_item_id": "<string>",
  "name": "<string>",
  "existing_user": {
    "created_at": "<string>",
    "found": true,
    "signup_source": "<string>",
    "user_id": "<string>"
  },
  "matched_prize_name": "<string>",
  "number": "<string>",
  "prize_raw": "<string>",
  "site_id": "<string>"
}
'

{}