curl --request POST \
  --url https://matcher.sandbox.lerian.net/v1/config/contexts/{contextId}/sources \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "Primary Bank Account",
  "type": "BANK",
  "config": {}
}
'

{
  "config": {},
  "contextId": "<string>",
  "createdAt": "<string>",
  "id": "<string>",
  "name": "<string>",
  "type": "LEDGER",
  "updatedAt": "<string>"
}