How to upload file to Dropbox with axios

Since request package is depricated (https://www.npmjs.com/package/request ) I opt to use axios for interaction with Dropbox API.

I need to upload files from node.js server

I'm getting error "Request failed with status code 400". Here is my code. What I'm doing wrong?

const uploadToExternalService = async function uploadToExternalService(token, path, content) {
   try {
      let res = await axios({
         url: 'https://api-content.dropbox.com/2/files/upload/',
         method: 'post',
         // timeout: 8000,
         headers: {
            Authorization: 'Bearer ' + token,
            'Content-Type': 'text/plain'
         },
         body: content
      })
      if(res.status == 200){
         // test for status you want, etc
         console.log(res.status)
      }
      if(res.status == 400){
         // test for status you want, etc
         console.log(res)
      }
      // Don't forget to return something
      return res.data
   }
   catch (err) {
      console.error(err);
   }
}

uploadToExternalService(SECRET_KEY, req.file.path, req.file).then(res => console.log(res));b