Schema/Schematron Control is Performed on the Ledger

var options = new RestClientOptions("https://apitest.nilvera.com")
{
    MaxTimeout = -1
};
var client = new RestClient(options);
var request = new RestRequest("/eledger/Documents/Schematron", Method.Post);
request.AddHeader("Content-Type", "application/json");
request.AddHeader("Authorization", "Bearer <API KEY>");

var body = @"
{
    ""Period"": ""string"",
    ""Year"": ""string""
}";
request.AddStringBody(body, DataFormat.Json);
RestResponse response = await client.ExecuteAsync(request);
Console.WriteLine(response.Content);