curl --request POST \
  --url https://api.getreply.in/v1/campaigns \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Idempotency-Key: <idempotency-key>' \
  --data '
{
  "name": "Diwali offer",
  "template": {
    "name": "diwali_offer",
    "language": "en"
  },
  "audience": {
    "tag": "VIP"
  }
}
'

const options = {
  method: 'POST',
  headers: {
    'Idempotency-Key': '<idempotency-key>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    name: 'Diwali offer',
    template: {name: 'diwali_offer', language: 'en'},
    audience: {tag: 'VIP'}
  })
};

fetch('https://api.getreply.in/v1/campaigns', 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.getreply.in/v1/campaigns",
  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([
    'name' => 'Diwali offer',
    'template' => [
        'name' => 'diwali_offer',
        'language' => 'en'
    ],
    'audience' => [
        'tag' => 'VIP'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "Idempotency-Key: <idempotency-key>"
  ],
]);

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

curl_close($curl);

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

import requests

url = "https://api.getreply.in/v1/campaigns"

payload = {
    "name": "Diwali offer",
    "template": {
        "name": "diwali_offer",
        "language": "en"
    },
    "audience": { "tag": "VIP" }
}
headers = {
    "Idempotency-Key": "<idempotency-key>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)