curl --request POST \
  --url https://api.bondio.co/v2/subscriptions/{xid}/plan-attachments \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "planId": "<string>",
  "activationAt": 123
}
'

import requests

url = "https://api.bondio.co/v2/subscriptions/{xid}/plan-attachments"

payload = {
    "planId": "<string>",
    "activationAt": 123
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({planId: '<string>', activationAt: 123})
};

fetch('https://api.bondio.co/v2/subscriptions/{xid}/plan-attachments', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "id": "<string>",
  "createdAt": 123,
  "activationAt": 123,
  "expirationAt": 123,
  "state": "CREATED",
  "usedAllowance": {
    "dataBytes": 1024,
    "voiceSeconds": 60,
    "smsMessages": 100
  },
  "plan": {
    "name": "Australia 1GB 7d",
    "dataMegaBytes": 1024,
    "periodDays": 1,
    "periodIterations": 7,
    "throttledSpeedKbps": 128,
    "label": "alpha",
    "coverageProfileId": "cvpr_ybrs38es"
  }
}