SalesForceDecoder

import Foundation

struct SalesForce: Codable {
  struct Records: Codable {
    struct Attributes: Codable {
      let type: String
      let url: String
    }

    let attributes: Attributes
    let name: String
    let id: String
    let rtmsCityLaneC: String
    let rtmsOfferRateC: Double
    let rtmsExpectedShipDate2C: String
    let originCityStateC: String

    private enum CodingKeys: String, CodingKey {
      case attributes
      case name = "Name"
      case id = "Id"
      case rtmsCityLaneC = "rtms__City_Lane__c"
      case rtmsOfferRateC = "rtms__Offer_Rate__c"
      case rtmsExpectedShipDate2C = "rtms__Expected_Ship_Date2__c"
      case originCityStateC = "Origin_City_State__c"
    }
  }

  let totalSize: Int
  let done: Bool
  let records: [Records]
}

let JSONString = """
{
   "totalSize":1,
   "done":true,
   "records":[
      {
         "attributes":{
            "type":"rtms__Load__c",
            "url":"/services/data/v42.0/sobjects/rtms__Load__c/a0j5b00000Lit4FAAR"
         },
         "Name":"385332",
         "Id":"a0j5b00000Lit4FAAR",
         "rtms__City_Lane__c":"SAVANNAH, GA: CONCORD, NC",
         "rtms__Offer_Rate__c":700.0,
         "rtms__Expected_Ship_Date2__c":"2021-02-26",
         "Origin_City_State__c":"SAVANNAH, GA"
      }
   ]
}
"""

func decodeData() {
    let decoder = JSONDecoder()
    guard let data = JSONString.data(using: .utf8),
    let salesForceObject = try? decoder.decode(SalesForce.self, from: data) else { return }
    let record =  salesForceObject.records[0]
    print("""
       \(record.name)
       \(record.id)
       \(record.rtmsCityLaneC)
       \(record.rtmsOfferRateC)
       \(record.rtmsExpectedShipDate2C)
       \(record.originCityStateC)

""")
}

decodeData()