curl --request POST \
  --url https://api.example.com/agents/spans/stats \
  --header 'Content-Type: application/json' \
  --data '
{
  "project_id": "<string>",
  "start": "2023-11-07T05:31:56Z",
  "bucket_by": {
    "type": "time"
  },
  "end": "2023-11-07T05:31:56Z",
  "granularity": 1,
  "group_by": [
    {
      "key": "<string>",
      "alias": "<string>",
      "source": "field"
    }
  ],
  "group_filters": [
    {
      "measure": {
        "alias": "<string>",
        "filter": {
          "$expr": {
            "$and": [
              {
                "$literal": "<string>"
              }
            ]
          }
        },
        "value": {
          "key": "<string>",
          "source": "field"
        }
      },
      "group_by": [
        {
          "key": "<string>",
          "alias": "<string>",
          "source": "field"
        }
      ],
      "max": 123,
      "min": 123
    }
  ],
  "group_limit": 50,
  "metrics": [
    {
      "alias": "<string>",
      "value": {
        "key": "<string>",
        "source": "field"
      },
      "aggregations": [],
      "percentiles": [
        123
      ]
    }
  ],
  "query": {
    "$expr": {
      "$and": [
        {
          "$literal": "<string>"
        }
      ]
    }
  },
  "timezone": "UTC"
}
'

{
  "end": "2023-11-07T05:31:56Z",
  "start": "2023-11-07T05:31:56Z",
  "timezone": "<string>",
  "bucket_type": "time",
  "columns": [
    {
      "name": "<string>",
      "aggregation": "<string>",
      "metric": "<string>"
    }
  ],
  "granularity": 123,
  "rows": [
    {}
  ]
}