{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "MessageAttributeValue",
  "type": "object",
  "properties": {
    "DataType": {
      "type": "string",
      "description": "The data type of the attribute. Supported types are String, String.Array, Number, and Binary."
    },
    "StringValue": {
      "type": "string",
      "description": "The string value of the attribute"
    },
    "BinaryValue": {
      "type": "string",
      "description": "The binary (base64-encoded) value of the attribute"
    }
  }
}