Amazon Pinpoint Sms Message Structure

{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/amazon-pinpoint/refs/heads/main/json-structure/amazon-pinpoint-sms-message-structure.json",
  "name": "SMSMessage",
  "description": "Specifies the default settings for a one-time SMS message that's sent directly to an endpoint.",
  "type": "object",
  "properties": {
    "Body": {
      "allOf": [
        {
          "$ref": "#/components/schemas/__string"
        },
        {
          "description": "The body of the SMS message."
        }
      ]
    },
    "Keyword": {
      "allOf": [
        {
          "$ref": "#/components/schemas/__string"
        },
        {
          "description": "The SMS program name that you provided to AWS Support when you requested your dedicated number."
        }
      ]
    },
    "MediaUrl": {
      "allOf": [
        {
          "$ref": "#/components/schemas/__string"
        },
        {
          "description": "This field is reserved for future use."
        }
      ]
    },
    "MessageType": {
      "allOf": [
        {
          "$ref": "#/components/schemas/MessageType"
        },
        {
          "description": "The SMS message type. Valid values are TRANSACTIONAL (for messages that are critical or time-sensitive, such as a one-time passwords) and PROMOTIONAL (for messsages that aren't critical or time-sensitive, such as marketing messages)."
        }
      ]
    },
    "OriginationNumber": {
      "allOf": [
        {
          "$ref": "#/components/schemas/__string"
        },
        {
          "description": "The number to send the SMS message from. This value should be one of the dedicated long or short codes that's assigned to your AWS account. If you don't specify a long or short code, Amazon Pinpoint assigns a random long code to the SMS message and sends the message from that code."
        }
      ]
    },
    "SenderId": {
      "allOf": [
        {
          "$ref": "#/components/schemas/__string"
        },
        {
          "description": "The sender ID to display as the sender of the message on a recipient's device. Support for sender IDs varies by country or region."
        }
      ]
    },
    "Substitutions": {
      "allOf": [
        {
          "$ref": "#/components/schemas/MapOfListOf__string"
        },
        {
          "description": "The message variables to use in the SMS message. You can override the default variables with individual address variables."
        }
      ]
    },
    "EntityId": {
      "allOf": [
        {
          "$ref": "#/components/schemas/__string"
        },
        {
          "description": "The entity ID or Principal Entity (PE) id received from the regulatory body for sending SMS in your country."
        }
      ]
    },
    "TemplateId": {
      "allOf": [
        {
          "$ref": "#/components/schemas/__string"
        },
        {
          "description": "The template ID received from the regulatory body for sending SMS in your country."
        }
      ]
    }
  }
}