Display Array in multiple rows using JavaScript

Hi,

I am getting data like below in my api property i.e. provider.updatedFieldsList

class property name:

public List<string> updatedFieldsList { get; set; }

updatedFieldsList=["documentType","liecenseType","licenseNumber","stateId","startDate","eraDate","documentUpload"]

But i want data like list with multiple rows, currently all value comming in [0] position

[documenttype]
[licenseType]
[licenseNumber]

formData.append('updatedFieldsList', JSON.stringify(changedFields));

i have added the data from here, then it comes to my web api.