this.state={
 person:
            {
                nose:'',
                legs:{
                    knees:'',
                    foot:{
                        finger:'',
                        nail:''
                    }
                }
            }
   }

<input name={props.name} onChange={handleChange} type="text" className="form-control" />

<TextInput name="nose" onChange={this.handleChange} />

handleChange(evt) {
    this.setState({ [evt.target.name]: evt.target.value });
}