> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mapp.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Update a prepared message

> Update prepared message.<br><br>trackingOverride controls message tracking consent override behavior:<br>1 = no override; per-contact tracking consent applies.<br>2 = full override; open and link-click tracking are enforced for all recipients regardless of individual consent.<br>3 = anonymized aggregate tracking for recipients whose consent is denied or withdrawn.<br>Any other value is rejected by this API.<br>On update, omit trackingOverride or send null to preserve the existing stored value; set trackingOverride to 1 explicitly to clear an active override.

## OpenAPI

````json POST /preparedmessage/update
{
  "openapi": "3.0.4",
  "info": {
    "title": "Engage public API",
    "version": "1"
  },
  "servers": [
    {
      "url": "https://your-engage-domain.com/api/rest"
    }
  ],
  "tags": [
    {
      "name": "Address Attributes"
    },
    {
      "name": "Async"
    },
    {
      "name": "Audit Log"
    },
    {
      "name": "Automation"
    },
    {
      "name": "Blacklist"
    },
    {
      "name": "CMS"
    },
    {
      "name": "Contact"
    },
    {
      "name": "Content"
    },
    {
      "name": "Coupon"
    },
    {
      "name": "Draft Message"
    },
    {
      "name": "Ecommerce"
    },
    {
      "name": "Group"
    },
    {
      "name": "Group Attributes"
    },
    {
      "name": "Landing Page"
    },
    {
      "name": "Member Attributes"
    },
    {
      "name": "Membership"
    },
    {
      "name": "Message"
    },
    {
      "name": "Meta"
    },
    {
      "name": "Mobile Push"
    },
    {
      "name": "Prepared Message"
    },
    {
      "name": "Process"
    },
    {
      "name": "Profile Attributes"
    },
    {
      "name": "Related Data"
    },
    {
      "name": "Segmentation"
    },
    {
      "name": "System"
    },
    {
      "name": "System User"
    },
    {
      "name": "Usage Statistics"
    },
    {
      "name": "User"
    },
    {
      "name": "Whiteboard"
    }
  ],
  "paths": {
    "/preparedmessage/update": {
      "post": {
        "tags": [
          "Prepared Message"
        ],
        "summary": "Update a prepared message",
        "description": "Update prepared message.<br><br>trackingOverride controls message tracking consent override behavior:<br>1 = no override; per-contact tracking consent applies.<br>2 = full override; open and link-click tracking are enforced for all recipients regardless of individual consent.<br>3 = anonymized aggregate tracking for recipients whose consent is denied or withdrawn.<br>Any other value is rejected by this API.<br>On update, omit trackingOverride or send null to preserve the existing stored value; set trackingOverride to 1 explicitly to clear an active override.",
        "operationId": "UpdatePreparedMessage",
        "requestBody": {
          "description": "Prepared message body.<br><br>trackingOverride controls message tracking consent override behavior:<br>1 = no override; per-contact tracking consent applies.<br>2 = full override; open and link-click tracking are enforced for all recipients regardless of individual consent.<br>3 = anonymized aggregate tracking for recipients whose consent is denied or withdrawn.<br>Any other value is rejected by this API.<br>On update, omit trackingOverride or send null to preserve the existing stored value; set trackingOverride to 1 explicitly to clear an active override.",
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/PreparedMessage"
              }
            }
          },
          "required": true,
          "x-bodyName": "body"
        },
        "responses": {
          "204": {
            "description": "",
            "content": {
              "application/octet-stream": {}
            }
          },
          "400": {
            "description": "",
            "content": {
              "application/octet-stream": {}
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "PreparedMessage": {
        "type": "object",
        "properties": {
          "contactId": {
            "type": "integer",
            "format": "int64"
          },
          "messageId": {
            "type": "integer",
            "format": "int64"
          },
          "name": {
            "type": "string"
          },
          "groupId": {
            "type": "integer",
            "format": "int64"
          },
          "groupName": {
            "type": "string"
          },
          "selectionId": {
            "type": "integer",
            "format": "int64"
          },
          "selectionName": {
            "type": "string"
          },
          "channelId": {
            "type": "integer",
            "format": "int64"
          },
          "channelName": {
            "type": "string"
          },
          "externalId": {
            "type": "string"
          },
          "messageCategoryId": {
            "type": "integer",
            "format": "int64"
          },
          "messageCategoryName": {
            "type": "string"
          },
          "message": {
            "$ref": "#/components/schemas/MessageBase"
          },
          "trackingOverride": {
            "type": "integer",
            "format": "int64"
          }
        }
      },
      "MessageBase": {
        "type": "object",
        "properties": {
          "subject": {
            "type": "string"
          },
          "emailBodyText": {
            "type": "string"
          },
          "emailBodyHtml": {
            "type": "string"
          },
          "smsText": {
            "type": "string"
          },
          "faxText": {
            "type": "string"
          },
          "emailHeaders": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/Attribute"
            }
          },
          "attachments": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/Attachment"
            }
          },
          "attachmentReferences": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/AttachmentReference"
            }
          },
          "encoding": {
            "type": "string"
          },
          "encodingSMS": {
            "type": "string"
          },
          "imageHandlingMode": {
            "type": "string"
          }
        }
      },
      "Attribute": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string"
          },
          "value": {
            "type": "string"
          }
        }
      },
      "Attachment": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string"
          },
          "contentType": {
            "type": "string"
          },
          "content": {
            "type": "string"
          }
        }
      },
      "AttachmentReference": {
        "type": "object",
        "properties": {
          "contentId": {
            "type": "string"
          },
          "reference": {
            "type": "string"
          }
        }
      }
    }
  }
}
````