How to parse String Data to JSON format or extract name value pair

I am developing a Web Page which receives below data over socket:

{
        "version":      1,
        "timestamp":    "1990-01-01T02:10:45.265Z",
        "points":       {
                        "motor_voltage": {
                                        "present_value":        0
                                },
                        "motor_current": {
                                        "present_value":        0
                                },
                        "speed_rpm":     {
                                        "present_value":        0
                                },
                        "running_hours": {
                                        "present_value":        1
                                },
                        "drive_temperature":     {
                                        "present_value":        0
                                },
                        "analog_input_2":        {
                                        "present_value":        0
                                },
                        "status_word":   {
                                        "present_value":        "600hex"
                                },
                        "digital_input": {
                                        "present_value":        64
                                },
                        "digital_output":        {
                                        "present_value":        0
                                }
                }
                                        "booldigital_output":        {
                                        "present_value":        0
                                }
}

I have tried a log how use JavaScript to parse this string and extract like below

motor_voltage: { present_value: 0 }

And all others – like we get each key value present_values in an array? If I call JSON.parse method – it throws an error that object is not in JSON format.

How can I extract the data from above string as per the values required?