curl --request POST \
  --url https://api.upwell.com/api/rest/rules \
  --header 'Content-Type: application/json' \
  --data '
{
  "input": {
    "actionValue": "<unknown>",
    "conditionExpression": "<string>",
    "createdAt": "<unknown>",
    "criteriaField": "<string>",
    "criteriaValue": "<string>",
    "customerId": "<string>",
    "enabled": true,
    "exceptionConfig": "<unknown>",
    "id": "<string>",
    "priority": 123,
    "ruleActionType": {},
    "ruleType": {},
    "updatedAt": "<unknown>",
    "validationExpression": "<string>"
  }
}
'

import requests

url = "https://api.upwell.com/api/rest/rules"

payload = { "input": {
        "actionValue": "<unknown>",
        "conditionExpression": "<string>",
        "createdAt": "<unknown>",
        "criteriaField": "<string>",
        "criteriaValue": "<string>",
        "customerId": "<string>",
        "enabled": True,
        "exceptionConfig": "<unknown>",
        "id": "<string>",
        "priority": 123,
        "ruleActionType": {},
        "ruleType": {},
        "updatedAt": "<unknown>",
        "validationExpression": "<string>"
    } }
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({
    input: {
      actionValue: '<unknown>',
      conditionExpression: '<string>',
      createdAt: '<unknown>',
      criteriaField: '<string>',
      criteriaValue: '<string>',
      customerId: '<string>',
      enabled: true,
      exceptionConfig: '<unknown>',
      id: '<string>',
      priority: 123,
      ruleActionType: {},
      ruleType: {},
      updatedAt: '<unknown>',
      validationExpression: '<string>'
    }
  })
};

fetch('https://api.upwell.com/api/rest/rules', 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.upwell.com/api/rest/rules",
  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([
    'input' => [
        'actionValue' => '<unknown>',
        'conditionExpression' => '<string>',
        'createdAt' => '<unknown>',
        'criteriaField' => '<string>',
        'criteriaValue' => '<string>',
        'customerId' => '<string>',
        'enabled' => true,
        'exceptionConfig' => '<unknown>',
        'id' => '<string>',
        'priority' => 123,
        'ruleActionType' => [
                
        ],
        'ruleType' => [
                
        ],
        'updatedAt' => '<unknown>',
        'validationExpression' => '<string>'
    ]
  ]),
  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 := "https://api.upwell.com/api/rest/rules"

	payload := strings.NewReader("{\n  \"input\": {\n    \"actionValue\": \"<unknown>\",\n    \"conditionExpression\": \"<string>\",\n    \"createdAt\": \"<unknown>\",\n    \"criteriaField\": \"<string>\",\n    \"criteriaValue\": \"<string>\",\n    \"customerId\": \"<string>\",\n    \"enabled\": true,\n    \"exceptionConfig\": \"<unknown>\",\n    \"id\": \"<string>\",\n    \"priority\": 123,\n    \"ruleActionType\": {},\n    \"ruleType\": {},\n    \"updatedAt\": \"<unknown>\",\n    \"validationExpression\": \"<string>\"\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("https://api.upwell.com/api/rest/rules")
  .header("Content-Type", "application/json")
  .body("{\n  \"input\": {\n    \"actionValue\": \"<unknown>\",\n    \"conditionExpression\": \"<string>\",\n    \"createdAt\": \"<unknown>\",\n    \"criteriaField\": \"<string>\",\n    \"criteriaValue\": \"<string>\",\n    \"customerId\": \"<string>\",\n    \"enabled\": true,\n    \"exceptionConfig\": \"<unknown>\",\n    \"id\": \"<string>\",\n    \"priority\": 123,\n    \"ruleActionType\": {},\n    \"ruleType\": {},\n    \"updatedAt\": \"<unknown>\",\n    \"validationExpression\": \"<string>\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.upwell.com/api/rest/rules")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"input\": {\n    \"actionValue\": \"<unknown>\",\n    \"conditionExpression\": \"<string>\",\n    \"createdAt\": \"<unknown>\",\n    \"criteriaField\": \"<string>\",\n    \"criteriaValue\": \"<string>\",\n    \"customerId\": \"<string>\",\n    \"enabled\": true,\n    \"exceptionConfig\": \"<unknown>\",\n    \"id\": \"<string>\",\n    \"priority\": 123,\n    \"ruleActionType\": {},\n    \"ruleType\": {},\n    \"updatedAt\": \"<unknown>\",\n    \"validationExpression\": \"<string>\"\n  }\n}"

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

{
  "createRule": {
    "actionValue": "<unknown>",
    "conditionExpression": "<string>",
    "createdAt": "<unknown>",
    "criteriaField": "<string>",
    "criteriaValue": "<string>",
    "customerId": "<string>",
    "id": "<string>",
    "priority": 123,
    "updatedAt": "<unknown>",
    "validationExpression": "<string>"
  }
}