Failing to make axios.put from react to node.js server - node.js

Question

I have react component where i trying to change status of object. However I'm failing and didn't understand whether I'm on right way.
This is nodeJS server with express and mongoose.
Frond end side:
handleSubmit2(event){
const body= {status: this.state.newstatus}
event.preventDefault()
axios.put('http://127.0.0.1:3010/api/users/:user_id',{body})
alert("Status Changed")
}
in render:
{hits.map(item => <li key={item._id}> {item.firstname} {item.lastname} <br /> <strong> {item.status}</strong>
<form autoComplete="off" className="new_status" onSubmit={this.handleSubmit2}>
<FormControl>{this.loadoptions()}</FormControl>
<input type="submit" value="Submit" className="input"/>
<br />
</form>
My back-end:
router.put( '/:user_id', ( req, res ) => {
console.log(req.body.body.status)
User.findByIdAndUpdate(req.params.user_id, req.body.body.status)
.then(data => {
if(follower)
res.send(data);
else
res.status(404).send("Follower not found");
})
.catch (e => res.status(400).send("Follower not exist"));
});
UserSchema:
const userSchema = new mongoose.Schema ({
firstname: String,
lastname: String,
status: String
});
const User = mongoose.model('User', userSchema);
Link to git:
https://github.com/fmpro12/users_add
When i submit form i want to change status of specific people from array.
What I'm doing wrong?