curl --request PATCH \
  --url https://clarus-api.com/api/ftp_mapping_groups/{mapping_group_id}/mappings/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-Clarus-Subdomain: <api-key>' \
  --data '
{
  "data": {
    "type": "ftp_mappings",
    "attributes": {
      "account_id": 5,
      "account_in_file": "ACME",
      "customer_id": 200,
      "customer_in_file": "CUST-200",
      "delivery_address_id": 91,
      "delivery_address_in_file": "DEL-A",
      "collection_address_id": 17,
      "collection_address_in_file": "COL-Z",
      "mapping_fields": [
        {
          "file_format": "csv"
        }
      ]
    }
  }
}
'

{
  "error": "<string>"
}