Vision Kit - Extract Image Data in Dictionary - iOS

Question

I had scan the image using Vision Kit framework and I was able to extract data in string but I want it in key value pair such like dictionary( [String: Any] ).

private var ocrRequest = VNRecognizeTextRequest(completionHandler: nil)

ocrRequest = VNRecognizeTextRequest { (request, error) in
guard let observations = request.results as? [VNRecognizedTextObservation] else { return }

var ocrText = ""

for observation in observations {
    
    guard let topCandidate = observation.topCandidates(1).first else { return }
    ocrText += topCandidate.string + "\n"
}


DispatchQueue.main.async {
    self.ocrTextView.text = ocrText
    self.scanButton.isEnabled = true
}
}

Output of the Observation String:

East Repair Inc.
Invoice #
US-001
Invoice Date
11/02/2019
P.O.#
2312/2019
Due Date
26/02/2019

and I need an output like:

{
  "marchantName": "East Repair Inc.",
  "invoiceNumber": "US-001",
  "invoiceDate": "11/02/2019"
   .
   .
   .
}