# Link payment account Endpoint: POST /api/user/v1/management/projects/{project_id}/subscriptions/{subscription_id}/payment_accounts Version: 2.0 Security: managementJwtAuth ## Path parameters: - `subscription_id` (integer, required) - `project_id` (integer, required) ## Request fields (application/json): - `payment_account_id` (integer, required) Example: 123 ## Response 200 fields ## Response 400 fields ## Response 404 fields ## Response 500 fields