Get Chip Calibration Time
-------------------------

*URL: http://xx.com/system/queryChipUpdateTime*

**Request Method:** Post

**Parameters:**

- backend (string): Backend ID (Non-nullable)

**Request Example:**

::

   {"backend":"72"}

**Return Example:**

::

   {
       "backend":"72",
       "chipLastUpdateTime": {
           "qubit":[43,45...],
           "timeStamp":[1687243363189...]
       },
       "errCode":0
   }