{
  "title": "Post Message to Stream",
  "description": "Example of posting a MessageML message to a Symphony stream",
  "operation": "POST /v4/stream/{sid}/message/create",
  "request": {
    "headers": {
      "sessionToken": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9...",
      "keyManagerToken": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9...",
      "Content-Type": "multipart/form-data"
    },
    "path": {
      "sid": "xhGidUNqcy5CJKNTM5s4Bn___rCZl7KqdA"
    },
    "body": {
      "message": "<messageML><p>Hello, <mention uid=\"123456789\" /></p><p>Here is today's market summary:</p><table><tr><td>AAPL</td><td>$185.20</td></tr><tr><td>MSFT</td><td>$378.85</td></tr></table></messageML>",
      "data": "{\"entityIdentifier\":\"market-summary\",\"date\":\"2026-05-03\"}"
    }
  },
  "response": {
    "status": 200,
    "body": {
      "messageId": "msg_ABC123xyz",
      "timestamp": 1746230400000,
      "message": "<div data-format=\"PresentationML\"><p>Hello, <span class=\"entity\" data-entity-id=\"0\">John Doe</span></p><p>Here is today's market summary:</p><table><tr><td>AAPL</td><td>$185.20</td></tr><tr><td>MSFT</td><td>$378.85</td></tr></table></div>",
      "user": {
        "userId": 987654321,
        "firstName": "Market",
        "lastName": "Bot",
        "displayName": "Market Summary Bot",
        "email": "marketbot@acme.com",
        "username": "market-summary-bot"
      },
      "stream": {
        "streamId": "xhGidUNqcy5CJKNTM5s4Bn___rCZl7KqdA",
        "streamType": { "type": "ROOM" }
      },
      "externalRecipients": false,
      "sid": 1234
    }
  }
}