mutation CreateConversationBookmark($input: CreateConversationBookmarkInput!) {
  createConversationBookmark(input: $input) {
    clientMutationId
    conversation {
      bookmarkedAt
      id
      lastChatAt
      title
      unreadCount
    }
    errors
  }
}

{
  "input": {
    "conversationId": "id"
  }
}

{
  "data": {
    "createConversationBookmark": {
      "clientMutationId": "string",
      "conversation": {
        "bookmarkedAt": "value",
        "id": "id",
        "lastChatAt": "value",
        "title": "string",
        "unreadCount": 1
      },
      "errors": [
        "string"
      ]
    }
  }
}