curl --request PATCH \
  --url https://api.paygentic.io/v0/prices/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "billableMetricId": "<string>",
  "invoiceDisplayName": "<string>",
  "model": "standard",
  "properties": {
    "unitPrice": "<string>"
  }
}'

{
  "id": "price_r7s8t9u0v1w2x3y4",
  "object": "price",
  "billableMetricId": "bm_z5a6b7c8d9e0f1g2",
  "createdAt": "2024-01-25T10:00:00Z",
  "currency": "USD",
  "description": "Per-call pricing for ML inference",
  "invoiceDisplayName": "Inference API Calls",
  "model": "standard",
  "paymentTerm": "instant",
  "properties": {
    "unitPrice": "0.05"
  },
  "unitAmount": "50000000",
  "updatedAt": "2024-03-05T14:20:00Z"
}