curl --request PUT \
  --url https://api.gleap.io/v3/helpcenter/collections/{helpcenterCollectionId}/articles/{helpcenterArticleId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "title": "<unknown>",
  "description": "<unknown>",
  "content": "<unknown>",
  "plainContent": "<unknown>",
  "helpcenterCollection": "<string>",
  "author": "<string>",
  "project": "<string>",
  "isDraft": true,
  "docId": 123,
  "expectedVersion": 123,
  "lexorank": "<string>",
  "upvotes": "<unknown>",
  "targetAudience": "all",
  "externalId": "<string>",
  "baseAudienceFilter": "<unknown>",
  "extendedAudienceFilter": "<unknown>",
  "tags": [
    "<string>"
  ],
  "newCollectionId": "<string>"
}
'

import requests

url = "https://api.gleap.io/v3/helpcenter/collections/{helpcenterCollectionId}/articles/{helpcenterArticleId}"

payload = {
    "title": "<unknown>",
    "description": "<unknown>",
    "content": "<unknown>",
    "plainContent": "<unknown>",
    "helpcenterCollection": "<string>",
    "author": "<string>",
    "project": "<string>",
    "isDraft": True,
    "docId": 123,
    "expectedVersion": 123,
    "lexorank": "<string>",
    "upvotes": "<unknown>",
    "targetAudience": "all",
    "externalId": "<string>",
    "baseAudienceFilter": "<unknown>",
    "extendedAudienceFilter": "<unknown>",
    "tags": ["<string>"],
    "newCollectionId": "<string>"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    title: '<unknown>',
    description: '<unknown>',
    content: '<unknown>',
    plainContent: '<unknown>',
    helpcenterCollection: '<string>',
    author: '<string>',
    project: '<string>',
    isDraft: true,
    docId: 123,
    expectedVersion: 123,
    lexorank: '<string>',
    upvotes: '<unknown>',
    targetAudience: 'all',
    externalId: '<string>',
    baseAudienceFilter: '<unknown>',
    extendedAudienceFilter: '<unknown>',
    tags: ['<string>'],
    newCollectionId: '<string>'
  })
};

fetch('https://api.gleap.io/v3/helpcenter/collections/{helpcenterCollectionId}/articles/{helpcenterArticleId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.gleap.io/v3/helpcenter/collections/{helpcenterCollectionId}/articles/{helpcenterArticleId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'title' => '<unknown>',
    'description' => '<unknown>',
    'content' => '<unknown>',
    'plainContent' => '<unknown>',
    'helpcenterCollection' => '<string>',
    'author' => '<string>',
    'project' => '<string>',
    'isDraft' => true,
    'docId' => 123,
    'expectedVersion' => 123,
    'lexorank' => '<string>',
    'upvotes' => '<unknown>',
    'targetAudience' => 'all',
    'externalId' => '<string>',
    'baseAudienceFilter' => '<unknown>',
    'extendedAudienceFilter' => '<unknown>',
    'tags' => [
        '<string>'
    ],
    'newCollectionId' => '<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;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.gleap.io/v3/helpcenter/collections/{helpcenterCollectionId}/articles/{helpcenterArticleId}"

	payload := strings.NewReader("{\n  \"title\": \"<unknown>\",\n  \"description\": \"<unknown>\",\n  \"content\": \"<unknown>\",\n  \"plainContent\": \"<unknown>\",\n  \"helpcenterCollection\": \"<string>\",\n  \"author\": \"<string>\",\n  \"project\": \"<string>\",\n  \"isDraft\": true,\n  \"docId\": 123,\n  \"expectedVersion\": 123,\n  \"lexorank\": \"<string>\",\n  \"upvotes\": \"<unknown>\",\n  \"targetAudience\": \"all\",\n  \"externalId\": \"<string>\",\n  \"baseAudienceFilter\": \"<unknown>\",\n  \"extendedAudienceFilter\": \"<unknown>\",\n  \"tags\": [\n    \"<string>\"\n  ],\n  \"newCollectionId\": \"<string>\"\n}")

	req, _ := http.NewRequest("PUT", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.put("https://api.gleap.io/v3/helpcenter/collections/{helpcenterCollectionId}/articles/{helpcenterArticleId}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"title\": \"<unknown>\",\n  \"description\": \"<unknown>\",\n  \"content\": \"<unknown>\",\n  \"plainContent\": \"<unknown>\",\n  \"helpcenterCollection\": \"<string>\",\n  \"author\": \"<string>\",\n  \"project\": \"<string>\",\n  \"isDraft\": true,\n  \"docId\": 123,\n  \"expectedVersion\": 123,\n  \"lexorank\": \"<string>\",\n  \"upvotes\": \"<unknown>\",\n  \"targetAudience\": \"all\",\n  \"externalId\": \"<string>\",\n  \"baseAudienceFilter\": \"<unknown>\",\n  \"extendedAudienceFilter\": \"<unknown>\",\n  \"tags\": [\n    \"<string>\"\n  ],\n  \"newCollectionId\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.gleap.io/v3/helpcenter/collections/{helpcenterCollectionId}/articles/{helpcenterArticleId}")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"title\": \"<unknown>\",\n  \"description\": \"<unknown>\",\n  \"content\": \"<unknown>\",\n  \"plainContent\": \"<unknown>\",\n  \"helpcenterCollection\": \"<string>\",\n  \"author\": \"<string>\",\n  \"project\": \"<string>\",\n  \"isDraft\": true,\n  \"docId\": 123,\n  \"expectedVersion\": 123,\n  \"lexorank\": \"<string>\",\n  \"upvotes\": \"<unknown>\",\n  \"targetAudience\": \"all\",\n  \"externalId\": \"<string>\",\n  \"baseAudienceFilter\": \"<unknown>\",\n  \"extendedAudienceFilter\": \"<unknown>\",\n  \"tags\": [\n    \"<string>\"\n  ],\n  \"newCollectionId\": \"<string>\"\n}"

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

{
  "updatedAt": "<string>",
  "createdAt": "<string>",
  "sourceUsage": 123,
  "version": 123,
  "isDraft": true,
  "targetAudience": "<string>",
  "tags": [
    "<string>"
  ],
  "extendedAudienceFilter": "<unknown>",
  "baseAudienceFilter": "<unknown>",
  "docId": 123,
  "author": {
    "isValid": {},
    "createFromHexString": {},
    "createFromTime": {},
    "generate": {},
    "cacheHexString": "<unknown>"
  },
  "helpcenterCollection": {
    "isValid": {},
    "createFromHexString": {},
    "createFromTime": {},
    "generate": {},
    "cacheHexString": "<unknown>"
  },
  "upvotes": "<unknown>",
  "plainContent": "<unknown>",
  "lexorank": "<string>",
  "project": {
    "isValid": {},
    "createFromHexString": {},
    "createFromTime": {},
    "generate": {},
    "cacheHexString": "<unknown>"
  },
  "externalId": "<string>",
  "content": "<unknown>",
  "title": "<unknown>",
  "description": "<unknown>"
}