curl --request PUT \
  --url https://api.sendrealm.com/contacts/{contact_id}/topics/{topic_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "is_subscribed": true
}
'

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({is_subscribed: true})
};

fetch('https://api.sendrealm.com/contacts/{contact_id}/topics/{topic_id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.sendrealm.com/contacts/{contact_id}/topics/{topic_id}"

payload = { "is_subscribed": True }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "status": 123,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": null
  }
}

{
  "status": 123,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": null
  }
}

{
  "status": 123,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": null
  }
}