curl --request PATCH \
  --url https://payments.oaknetwork.org/api/v1/subscription/plans/{planId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "description": "<string>",
  "frequency": 123,
  "price": 123,
  "currency": "<string>",
  "created_by": "<string>",
  "overridden_price": 123,
  "start_time": "2023-12-25",
  "end_time": "2023-12-25",
  "is_auto_renewable": true,
  "allow_amount_override": true,
  "campaign_id": "<string>",
  "campaign_name": "<string>"
}
'

{
  "msg": "plan updated",
  "data": "<string>"
}