{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/Balance",
  "title": "Balance",
  "type": "object",
  "properties": {
    "balance_id": {
      "type": "string",
      "description": "Unique identifier for the balance."
    },
    "amount": {
      "type": "number",
      "format": "float",
      "description": "Current balance amount."
    },
    "units": {
      "type": "string",
      "description": "Units of the balance amount."
    },
    "purchase": {
      "type": "string",
      "description": "Purchase method or plan name."
    }
  }
}