Having trouble decoding retrieved JSON object in Swift - json

Question

I am able to retrieve some JSON from an endpoint but then when I try to decode that JSON into my model object something goes wrong to where the json can't be parsed. I've made sure the properties in my model object matched the json keys, so I dont understand what the issue is. It prints out the catch block every time.
Here is my code to retrieve the json:
func getServiceProviders() {
let session = URLSession.shared
let url = URL(string: "http://exampleendpoint.com/example")!
URLSession.shared.dataTask(with: url) { data, response, error in
//Here is where I try to decode the json into my model object
do {
let jsonContent = try JSONDecoder().decode(ServiceObject.self, from: data!)
print(jsonContent)
} catch {
print("Ooops")
}
}.resume()
Here is my model object:
struct ServiceObject: Decodable {
let serviceproviders: [ServiceProvider]
struct ServiceProvider: Decodable {
let city: String
let coordinates: Location
let name: String
let overallGrade: String
let postalCode: Int
let state: String
let reviewCount: Int
}
struct Location: Decodable {
let latitude: Double
let longitude: Double
}
}
Here is what the json object I retrieve looks like:
{
"serviceproviders": [
{
"city" : "Beech Grove",
"coordinates" : {
"latitude" : "39.715417",
"longitude" : "-86.095646"
},
"name" : "William J Ciriello Plumbing Co Inc",
"overallGrade" : "A",
"postalCode" : "46107",
"state" : "Indiana",
"reviewCount" : 309
},
{
"city" : "Indianapolis",
"coordinates" : {
"latitude" : "39.922607",
"longitude" : "-86.0267094"
},
"name" : "Roby's Plumbing & Appliance Service",
"overallGrade" : "B",
"postalCode" : "46256",
"state" : "Indiana",
"reviewCount" : 903
},