curl --request POST \
  --url http://localhost:4200/ops \
  --header 'Content-Type: application/json' \
  --data '
{
  "ops": "<unknown>",
  "session": "<string>",
  "siteId": "<string>",
  "componentsManifest": {},
  "siteCapabilities": {
    "allowStructuralEdits": true,
    "checkedAt": "<string>",
    "reason": "<string>",
    "manifestVersion": 123,
    "blockCount": 4503599627370495
  }
}
'

import requests

url = "http://localhost:4200/ops"

payload = {
    "ops": "<unknown>",
    "session": "<string>",
    "siteId": "<string>",
    "componentsManifest": {},
    "siteCapabilities": {
        "allowStructuralEdits": True,
        "checkedAt": "<string>",
        "reason": "<string>",
        "manifestVersion": 123,
        "blockCount": 4503599627370495
    }
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    ops: '<unknown>',
    session: '<string>',
    siteId: '<string>',
    componentsManifest: {},
    siteCapabilities: {
      allowStructuralEdits: true,
      checkedAt: '<string>',
      reason: '<string>',
      manifestVersion: 123,
      blockCount: 4503599627370495
    }
  })
};

fetch('http://localhost:4200/ops', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_PORT => "4200",
  CURLOPT_URL => "http://localhost:4200/ops",
  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([
    'ops' => '<unknown>',
    'session' => '<string>',
    'siteId' => '<string>',
    'componentsManifest' => [
        
    ],
    'siteCapabilities' => [
        'allowStructuralEdits' => true,
        'checkedAt' => '<string>',
        'reason' => '<string>',
        'manifestVersion' => 123,
        'blockCount' => 4503599627370495
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "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 := "http://localhost:4200/ops"

	payload := strings.NewReader("{\n  \"ops\": \"<unknown>\",\n  \"session\": \"<string>\",\n  \"siteId\": \"<string>\",\n  \"componentsManifest\": {},\n  \"siteCapabilities\": {\n    \"allowStructuralEdits\": true,\n    \"checkedAt\": \"<string>\",\n    \"reason\": \"<string>\",\n    \"manifestVersion\": 123,\n    \"blockCount\": 4503599627370495\n  }\n}")

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

	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.post("http://localhost:4200/ops")
  .header("Content-Type", "application/json")
  .body("{\n  \"ops\": \"<unknown>\",\n  \"session\": \"<string>\",\n  \"siteId\": \"<string>\",\n  \"componentsManifest\": {},\n  \"siteCapabilities\": {\n    \"allowStructuralEdits\": true,\n    \"checkedAt\": \"<string>\",\n    \"reason\": \"<string>\",\n    \"manifestVersion\": 123,\n    \"blockCount\": 4503599627370495\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("http://localhost:4200/ops")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"ops\": \"<unknown>\",\n  \"session\": \"<string>\",\n  \"siteId\": \"<string>\",\n  \"componentsManifest\": {},\n  \"siteCapabilities\": {\n    \"allowStructuralEdits\": true,\n    \"checkedAt\": \"<string>\",\n    \"reason\": \"<string>\",\n    \"manifestVersion\": 123,\n    \"blockCount\": 4503599627370495\n  }\n}"

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