Get a specific promotion on an On Demand page

{
  "type": "object",
  "properties": {
    "ondemand_id": {
      "type": "number"
    },
    "promotion_id": {
      "type": "number"
    }
  },
  "required": [
    "ondemand_id",
    "promotion_id"
  ],
  "additionalProperties": false
}