$url = "URL";
                    $apiKey = 'Your Private Key';
                    $header = array(
                        'Content-Type: application/json; charset=utf-8',
                        'Authorization: ' . $apiKey
                    );

                    $Body = json_encode(
                            array(
                                'ServiceCode' => '',
                                'Type' => '',
                                'Param' => ''
                            )
                    );

                    $ch = curl_init($url);
                    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
                    curl_setopt($ch, CURLINFO_HEADER_OUT, true);
                    curl_setopt($ch, CURLOPT_POST, true);
                    curl_setopt($ch, CURLOPT_POSTFIELDS, $Body);
                    curl_setopt($ch, CURLOPT_HTTPHEADER, $header);

                    // Submit the POST request
                    $Resopnse = curl_exec($ch);

                    curl_close($ch);
            

                [httpPost]
                public async Task FunctionPost()
                {
                    string ApiUrl = "URL";
                    string APIKEY = "Your Private Key";
                    using (HttpClient client = new HttpClient())
                    {
                        var Body = new Dictionary< String , String>
                        {
                            {"ServiceCode", ""},                            
                            {"Param", [
		                                { 
			                                "FieldName": "BIRTH_DATE",
			                                "DataType": "DateTime",
			                                "Value": "2004-01-01",
			                                "Operator": "Greater"
		                                },
		                                { 
			                                "FieldName": "SEX",
			                                "DataType": "Numeric",
			                                "Value": "1",
			                                "Operator": "Equal"
		                                }
	                                  ]
                            },
                        };

                        client.BaseAddress = new Uri(apiUrl);
                        client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
                        client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", APIKEY);
                        HttpResponseMessage response = await client.PostAsJsonAsync(ApiUrl, Body);
                        var Results = await response.Content.ReadAsStringAsync();
                        foreach (var Item in JsonConvert.DeserializeObject< List< object > >(Results))
                        {
                            // Do Something
                        }
                    }
                }
                

                    $url = "URL";
                    $apiKey = 'Your Private Key';
                    $header = array(
                        'Content-Type: application/json; charset=utf-8',
                        'Authorization: ' . $apiKey
                    );

                    $Body = json_encode(
                            array(
                                'ServiceCode' => '',                                
                                'Param' => array(
                                            'FieldName' => 'BIRTH_DATE',
                                            'DataType' => 'DateTime',
                                            'Value' => '2004-01-01',
                                            'Operator' => 'Greater'
                                           )
                            )
                    );

                    $ch = curl_init($url);
                    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
                    curl_setopt($ch, CURLINFO_HEADER_OUT, true);
                    curl_setopt($ch, CURLOPT_POST, true);
                    curl_setopt($ch, CURLOPT_POSTFIELDS, $Body);
                    curl_setopt($ch, CURLOPT_HTTPHEADER, $header);

                    // Submit the POST request
                    $Resopnse = curl_exec($ch);

                    curl_close($ch);