curl --request GET \
  --url https://matcher.sandbox.lerian.net/v1/imports/formats/templates/{templateId} \
  --header 'Authorization: Bearer <token>'

{
  "createdAt": "2023-11-07T05:31:56Z",
  "discriminator": {
    "length": 123,
    "startByte": 123
  },
  "formatKey": "<string>",
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "recordTypeCount": 123,
  "recordWidths": {},
  "records": [
    {
      "fields": [
        {
          "kind": "<string>",
          "length": 123,
          "name": "<string>",
          "startByte": 123
        }
      ],
      "recordType": "<string>",
      "width": 123
    }
  ],
  "requiredFields": [
    "<string>"
  ],
  "variantKey": "<string>"
}