using System;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string json = @"{

  ""info"": {

    ""_postman_id"": ""10594116-1473-46db-b730-b84244afebb6"",

    ""name"": ""Invoices"",

    ""schema"": ""https://schema.getpostman.com/json/collection/v2.1.0/collection.json"",

    ""_exporter_id"": ""23936755""

  },

  ""item"": [

    {

      ""name"": ""019048MAM000"",

      ""request"": {

        ""auth"": {

          ""type"": ""bearer"",

          ""bearer"": [

            {

              ""key"": ""token"",

              ""value"": ""eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiJrYWFiaUBuZy1zaWduLmNvbSIsImlhdCI6MTY3NzQ4OTQ3Mn0.sfuXtnegdizRDCCGCp9Nj2gGrTeF4LY35GVt9to9PY7RMpNdMvGGc77elG52qNphHTQ0teFcoZN4yPSHXQ56Wg"",

              ""type"": ""string""

            }

          ]

        },

        ""method"": ""POST"",

        ""header"": [

          {

            ""key"": ""content-type"",

            ""value"": ""application/json""

          }

        ],

        ""body"": {

          ""mode"": ""raw"",

          ""raw"": ""{\r\n    \""invoiceTIEF\"": {\r\n        \""supplierIdentifier\"": \""002264HAM001\"",\r\n        \""supplierDetails\"": {\r\n            \""partnerIdentifier\"": \""002264HAM001\"",\r\n            \""partnerName\"": \""SNDP\"",\r\n            \""address\"": {\r\n                \""description\"": \""Addresse SNDP\"",\r\n                \""street\"": \""Rue\"",\r\n                \""cityName\"": \""Rue\"",\r\n            }}}}"",

          ""url"": {

            ""raw"": ""https://test.com/server/protected/invoice/"",

            ""protocol"": ""https"",

            ""host"": [

              ""test"",

              ""tst-sign"",

              ""com""

            ],

            ""path"": [

              ""server"",

              ""protected"",

              ""invoice"",

              """"

            ]

          },

          ""description"": ""SNDP Gateway WS""

        },

        ""response"": []

      }

    }

  ]

}";

        //string json = File.ReadAllText("invoice.json");

        dynamic jsonObj = Newtonsoft.Json.JsonConvert.DeserializeObject(json);

        JObject rawJObj = JObject.Parse(jsonObj["item"][0]["request"]["body"]["raw"].ToString());

        rawJObj["supplierIdentifier"] = "019048MAM000";

        jsonObj["item"][0]["request"]["body"]["raw"] = Newtonsoft.Json.JsonConvert.SerializeObject(rawJObj);

        string output = Newtonsoft.Json.JsonConvert.SerializeObject(jsonObj, Newtonsoft.Json.Formatting.Indented);

        //File.WriteAllText("invoice.json", output);

        Console.WriteLine(output);

    }

}