curl --request PUT \
  --url https://api.example.com/v1/ui/products/{id}/plans/{planId} \
  --header 'Content-Type: application/json' \
  --data '
{
  "limits": {},
  "features": {},
  "metadata": {},
  "name": "<string>",
  "description": "<string>",
  "billingCycle": "weekly",
  "price": 123,
  "creditsPerUnit": 123,
  "currency": "<string>",
  "billingModel": "pre-paid",
  "freeUnits": 123,
  "limit": 123,
  "status": "active",
  "maxActiveUsers": 123,
  "accessExpiryDays": 123,
  "default": true
}
'

{
  "type": "recurring",
  "reference": "pln_1A2B3C4D",
  "price": 2999,
  "currency": "USD",
  "requiresPayment": true,
  "isActive": true,
  "status": "active",
  "createdAt": "<string>",
  "updatedAt": "<string>",
  "meterRef": "mtr_1A2B3C4D",
  "name": "Starter",
  "description": "Best for teams getting started",
  "currencySymbol": "$",
  "freeUnits": 100,
  "setupFee": 500,
  "trialDays": 14,
  "billingCycle": "monthly",
  "billingModel": "pre-paid",
  "creditsPerUnit": 1,
  "measures": "requests",
  "limit": 10000,
  "rolloverUnusedUnits": false,
  "limits": {},
  "features": {},
  "maxActiveUsers": 123,
  "accessExpiryDays": 123
}