mutation MarkAllConversationsRead($input: MarkAllConversationsReadInput!) {
  markAllConversationsRead(input: $input) {
    clientMutationId
    errors
    success
  }
}

{
  "input": {}
}

{
  "data": {
    "markAllConversationsRead": {
      "clientMutationId": "string",
      "errors": [
        "string"
      ],
      "success": true
    }
  }
}