curl --request POST \
  --url https://api.sendrealm.com/contacts/{contact_id}/audiences/{audience_id} \
  --header 'Authorization: Bearer <token>'

const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.sendrealm.com/contacts/{contact_id}/audiences/{audience_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}/audiences/{audience_id}"

headers = {"Authorization": "Bearer <token>"}

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

print(response.text)

{
  "status": 123,
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "contact_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "audience_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "is_subscribed": true,
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  },
  "error": null,
  "metadata": null
}

{
  "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
  }
}

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