curl --request POST \
  --url https://payments.oaknetwork.org/api/v1/subscription/subscribe \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "plan_id": "<string>",
  "source_customer_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "destination_customer_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "payment_method_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "payment_method_type": "CARD",
  "payment_method_provider": "<string>",
  "fee_bearer": "connected_account"
}
'

{
  "msg": "Subscription created successfully",
  "data": {
    "id": "<string>",
    "status": "pending_activation",
    "sub_status": "payment_init"
  }
}