curl --request GET \
  --url https://api.smokeball.com/matters/{matterId}/fees/{id} \
  --header 'Authorization: <api-key>' \
  --header 'x-api-key: <api-key>'

{
  "href": "<string>",
  "relation": "<string>",
  "method": "GET",
  "self": {
    "id": "<string>",
    "href": "<string>",
    "relation": "<string>",
    "method": "GET"
  },
  "id": "b471682e-fa17-4e46-b7fe-9b2b8fdcb3c2",
  "versionId": "750eb5c5-ac0b-7d11-4997-e0ce9d8896c8",
  "matter": {
    "id": "<string>",
    "href": "<string>",
    "relation": "<string>",
    "method": "<string>"
  },
  "staff": {
    "id": "<string>",
    "href": "<string>",
    "relation": "<string>",
    "method": "<string>"
  },
  "matterId": "<string>",
  "staffId": "<string>",
  "createdByUserId": "750eb5c5-ac0b-7d11-4997-e0ce9d8896c8",
  "lastUpdatedByUserId": "750eb5c5-ac0b-7d11-4997-e0ce9d8896c8",
  "invoiceId": "750eb5c5-ac0b-7d11-4997-e0ce9d8896c8",
  "activityCode": "PRT",
  "utbmsTaskCode": "L110",
  "subject": "Review contract",
  "description": "Print documents",
  "feeDate": "2022-07-01",
  "feeType": 0,
  "finalized": false,
  "isInvoicedExternally": false,
  "isWrittenOff": false,
  "isBillable": false,
  "tax": 35,
  "taxInclusive": false,
  "duration": 60,
  "durationWorked": 50,
  "rate": 350,
  "amount": 350,
  "amountExcTax": 315,
  "amountIncTax": 350,
  "billableAmountExcTax": 315,
  "billableTax": 35,
  "isDeleted": false,
  "sourceItems": [
    {
      "id": "<string>",
      "href": "<string>",
      "relation": "<string>",
      "method": "GET",
      "self": {
        "id": "<string>",
        "href": "<string>",
        "relation": "<string>",
        "method": "<string>"
      },
      "description": "<string>",
      "duration": 123,
      "isBillable": true
    }
  ],
  "createdFromActivityId": "504b9f77-20c7-4dee-8227-d3007c8f6cea"
}