Making an azure Function to merge two JSON objects

{ "main_object": "{ \"name\": \"some name\", \"more_properties\": \"values\" }" }

[FunctionName("MergeSingleAsync")]
public static async Task<IActionResult> RunAsync(
[HttpTrigger(AuthorizationLevel.Function, "post", Route = null)]
HttpRequest req, ILogger log)
{
  string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
  Inputs data = JsonConvert.DeserializeObject<Inputs>(requestBody);
  // ...
}

class Inputs
{
  [JsonProperty("main_object")] public string MainObject {get;set;} // Should be JToken??
  [JsonProperty("secondary_object")] public string SecondaryObject {get;set;} // Should be JToken??
  [JsonProperty("matching_property")] public JToken MatchingProperty {get;set;}
  [JsonProperty("merge_properties")] public string[] MergeProperties {get;set;}
}