PATCH /v3/prices/:id

Update an existing price's `value`. Only `value` is mutable; `date`
is part of the price's identity.

Path params:
  id (required) — Price identifier.

Request:
{
  "data": {
    "type": "price",
    "attributes": {
      "value": "number (required)"
    }
  }
}

Response (204 No Content):
  Empty body.