Android Unable to upload file to Google Cloud storage using signed url

Question

I am trying to upload a file to Google Cloud Storage using the signed url generated by the backend server it gives this error

SignatureDoesNotMatchThe request signature we calculated does not match the signature you provided. Check your Google secret key and signing method.PUT

multipart/form-data; boundary=50b17d2b-3095-4762-b93f-fa87bbe1c7bd
1926666331
/bucket_name/r1m767lcbtxnuu34hu9klrljf65q</StringToSign></Error>

i am using okhttp put request with multipart to upload the file like this

private fun directUpload(signedUrl: String, file: File) {
    try {
        val requestBody: RequestBody = RequestBody.create(
            file.getMimeType().toMediaTypeOrNull(),
            file
        )
        val request: Request = Request.Builder().url(signedUrl).put(requestBody)
            .build()
        val client = OkHttpClient()
        val response: Response = client.newCall(request).execute()
        if (response.isSuccessful) {
            response.toString()
            Log.d("Response_Direct_Upload", "FileUploaded")
        } else {
            Log.d("Response_Direct_Upload", response.body?.string().toString())
        }
    } catch (ex: Exception) {
        Log.d("Response_Direct_Upload", "FileUploadFailedException")
    }
}

The signed url generated by server looks like this

https://storage.googleapis.com/bucket_name/r1m767lcbtxnuu34hu9klrljf65q?GoogleAccessId=***************************&Expires=1926666331&Signature=yZmRFP%2BrvtsSy8AX%2F1eug2GN0wn%2BcrZVdHpICV5e%2F6ww0ioNusnEvk8G1u9oGmm3tE0XFr5rpiZ2q3hZ0%2BWx7dcOJlX95arXl1tiqV3p7ZO5qhRr1ZE3JkU1reNZF1yrQQVJiTgBy5mQTtXbWolAKbeo3JITY6ah3AMy%2FbpuGMpwr3vaNUM8HcbqOjPC%2FeWUrqGK3G57SKhz35OX6FK4SEAGNVauM7568L%2FT9h8DJLLr5QiyUgHXqNQjlBFuedI9CXaPthB3A086aDETNWhwtAS1h5vSGFTEy36thv6subXJZwC2vRNUfSEZxGA9hv0upwovJOVLsetipeIhBiXNJQ%3D%3D