{
  "id": "document id",
  "attachment": "attachment id", // if {put,get,remove}Attachment command
  "result": "success", // or "error"
  "status": 200,
  "statusText": "Ok",

  // if result -> success
  "data": { // if get
    "title": "val",
    "description": "val"
  },
  "data": { // if allDocs
    "total_rows": ...,
    "rows": [...]
  },
  "data": Blob, // if getAttachment

  // if result -> error
  "message": ...,
  "reason": ...,
  "error": ...
}