curl https://api.thanxsandbox.com/purchases \
  -X POST \
  -H "Content-Type: application/json"  \
  -H "Accept-Version: v4.0" \
  -H "Accept: application/json" \
  -H "Authorization: Bearer ${token}" \
  -H "X-ClientId: ${client_id}" 
  -d '{
    "purchase": {
      "merchant_id":  "weoru",
      "location_id":  "hljkfd2345",
      "user_id":      "wgljsdwer23",
      "amount":       13.45,
      "purchased_at": "2020-09-15T00:52:10.655+00:00",
      "card_id":      null
    }
  }'

{}