curl --request PUT \
  --url https://api.smokeball.com/matters/{matterId}/expenses/{id} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json-patch+json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "updatedByUserId": "750eb5c5-ac0b-7d11-4997-e0ce9d8896c8",
  "staffId": "47efff74-3e4b-45b3-bddf-affc6649db0b",
  "invoiceId": "fdb766bc-eb20-4bc1-9417-08b51a7b2286",
  "expenseDate": "2022-07-01",
  "activityCode": "PRT",
  "subject": "Review contract",
  "description": "Print documents",
  "quantity": 3,
  "price": 350.32,
  "tax": 90,
  "taxInclusive": false,
  "finalized": false,
  "isWrittenOff": false,
  "isBillable": false,
  "isInvoicedExternally": false,
  "assignToFirmOwner": true
}'

{
  "id": "<string>",
  "href": "<string>",
  "relation": "<string>",
  "method": "GET"
}