curl --request GET \
  --url https://matcher.sandbox.lerian.net/v1/reports/contexts/{contextId}/dashboard/source-breakdown \
  --header 'Authorization: Bearer <token>'

{
  "sources": [
    {
      "sourceId": "<string>",
      "sourceName": "<string>",
      "totalTransactions": 123,
      "matchedTransactions": 123,
      "unmatchedTransactions": 123,
      "matchRate": 123,
      "totalAmount": "<string>",
      "unmatchedAmount": "<string>",
      "currency": "USD"
    }
  ]
}