curl --request POST \
  --url https://api.virtuoussoftware.com/api/Contact/{contactId}/Collection/{customCollectionId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "fields": [
    {
      "name": "<string>",
      "value": "<string>"
    },
    {
      "name": "<string>",
      "value": "<string>"
    }
  ]
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    fields: [{name: '<string>', value: '<string>'}, {name: '<string>', value: '<string>'}]
  })
};

fetch('https://api.virtuoussoftware.com/api/Contact/{contactId}/Collection/{customCollectionId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.virtuoussoftware.com/api/Contact/{contactId}/Collection/{customCollectionId}"

payload = { "fields": [
        {
            "name": "<string>",
            "value": "<string>"
        },
        {
            "name": "<string>",
            "value": "<string>"
        }
    ] }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

using RestSharp;


var options = new RestClientOptions("https://api.virtuoussoftware.com/api/Contact/{contactId}/Collection/{customCollectionId}");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "Bearer <token>");
request.AddJsonBody("{\n  \"fields\": [\n    {\n      \"name\": \"<string>\",\n      \"value\": \"<string>\"\n    },\n    {\n      \"name\": \"<string>\",\n      \"value\": \"<string>\"\n    }\n  ]\n}", false);
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.virtuoussoftware.com/api/Contact/{contactId}/Collection/{customCollectionId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'fields' => [
        [
                'name' => '<string>',
                'value' => '<string>'
        ],
        [
                'name' => '<string>',
                'value' => '<string>'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

HttpResponse<String> response = Unirest.post("https://api.virtuoussoftware.com/api/Contact/{contactId}/Collection/{customCollectionId}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"fields\": [\n    {\n      \"name\": \"<string>\",\n      \"value\": \"<string>\"\n    },\n    {\n      \"name\": \"<string>\",\n      \"value\": \"<string>\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.virtuoussoftware.com/api/Contact/{contactId}/Collection/{customCollectionId}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"fields\": [\n    {\n      \"name\": \"<string>\",\n      \"value\": \"<string>\"\n    },\n    {\n      \"name\": \"<string>\",\n      \"value\": \"<string>\"\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

const url = 'https://api.virtuoussoftware.com/api/Contact/{contactId}/Collection/{customCollectionId}';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    fields: [{name: '<string>', value: '<string>'}, {name: '<string>', value: '<string>'}]
  })
};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

{
  "customCollectionId": "<integer>",
  "customCollectionName": "<string>",
  "collectionInstanceId": "<integer>",
  "fields": [
    {
      "name": "<string>",
      "value": "<string>"
    },
    {
      "name": "<string>",
      "value": "<string>"
    }
  ]
}

{
  "message": "Authorization has been denied for this request."
}

{
  "message": "You do not have permission to perform this action."
}

{
  "message": "Rate limit exceeded. Try again later."
}