Get envelope analytics

{
  "success": true,
  "statusCode": 100,
  "message": "string",
  "details": "string",
  "timestamp": "2019-08-24T14:15:22Z",
  "path": "string",
  "responseTime": "string",
  "meta": {
    "currentPage": 1,
    "totalPages": 1,
    "totalItems": 0,
    "itemsPerPage": 1
  },
  "data": {
    "overview": {
      "totalEnvelopes": 0,
      "completedCount": 0,
      "pendingCount": 0,
      "draftCount": 0,
      "voidedCount": 0,
      "declinedCount": 0,
      "expiredCount": 0,
      "completionRate": 0,
      "totalRecipients": 0,
      "signedRecipients": 0,
      "avgSigningDays": 0
    },
    "trends": {
      "today": 0,
      "thisWeek": 0,
      "thisMonth": 0,
      "thisYear": 0,
      "last30Days": [
        {
          "date": "string",
          "count": 0
        }
      ]
    },
    "statusBreakdown": [
      {
        "status": "string",
        "count": 0
      }
    ],
    "recentActivity": [
      {
        "id": "string",
        "title": "string",
        "status": "string",
        "createdAt": "string",
        "recipientCount": 0,
        "completedRecipients": 0
      }
    ],
    "deltas": {
      "periodDays": 0,
      "totalEnvelopes": {
        "current": 0,
        "previous": 0,
        "delta": 0,
        "deltaPercent": 0,
        "insufficientData": true
      },
      "completed": {
        "current": 0,
        "previous": 0,
        "delta": 0,
        "deltaPercent": 0,
        "insufficientData": true
      },
      "completionRate": {
        "current": 0,
        "previous": 0,
        "delta": 0,
        "deltaPercent": 0,
        "insufficientData": true
      }
    }
  }
}