Request POST with Json Body

I know there are lots of similar question like this but I have tried to follow and request body from API call but somehow it returns (400) Bad Request. Can anyone help to check on my code? 😞

let
    payload = "{
     ""resultMode"": 1,
     ""startDate"": ""2022-12-01"",
     ""endDate"": ""2022-12-01""
}",
options = [Headers =[ #"Content-Type" = "application/json"], Content = Text.ToBinary(payload)],
 result = Json.Document(Web.Contents("https://api.questionpro.com/a/api/v2/surveys/xxx/responses?page=1&perPage=1000&apiKey=xxxxx", options))
in
 result