Request to google speech to text api returns no result, but ok status 200 and totalBilledTime and requestId. I sent a request via postman but doesn’t work either.

payload and code

{
  "audio": {
    "content": "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"
  },
  "config": {
    "encoding": "AMR_WB",
    "sampleRateHertz": 16000,
    "languageCode": "en-US"
  }
}

code:

 import { Audio } from "expo-av";
    import { MutableRefObject } from "react";
    import * as FileSystem from "expo-file-system";
    import { Platform } from "react-native";
    import * as Device from "expo-device";
    import { readBlobAsBase64 } from "./readBlobAsBase64";
    
    export const transcribeSpeech = async (
      audioRecordingRef: MutableRefObject<Audio.Recording>
    ) => {
      try {
        await Audio.setAudioModeAsync({
          allowsRecordingIOS: false,
          playsInSilentModeIOS: false,
        });
        const isPrepared = audioRecordingRef?.current?._canRecord;
        if (isPrepared) {
          await audioRecordingRef?.current?.stopAndUnloadAsync();
    
          const recordingUri = audioRecordingRef?.current?.getURI() || "";
          let base64Uri = "";
    
          if (Platform.OS === "web") {
            const blob = await fetch(recordingUri).then((res) => res.blob());
            const foundBase64 = (await readBlobAsBase64(blob)) as string;
            // Example: data:audio/wav;base64,asdjfioasjdfoaipsjdf
            const removedPrefixBase64 = foundBase64.split("base64,")[1];
            base64Uri = removedPrefixBase64;
          } else {
            base64Uri = await FileSystem.readAsStringAsync(recordingUri, {
              encoding: FileSystem.EncodingType.Base64,
            });
          }
          
          const dataUrl = base64Uri;