¿ Porque no me funciona el FromJSON ?

Hola, Cuando estoy convirtiendo el siguiente JSON:

{"time":["0","12.84995","15.04991","17.02488","0","9.449999","11.49997","13.57494"],"type":["1","1","1","1","1","1","1","1"],"data":["100","40.5","41","36.5\"","100","77","38.5","39\""]}

A 3 arrays en unity, De la siguiente manera:

public class Play : MonoBehaviour {

 public float[] time;
 public float[] type;
 public float[] data;

 private void Start()
 {
     StartCoroutine(Count());
 }

 IEnumerator Count()
 {
     yield return new WaitForSeconds(0.5f);
     Convert();
 }

 void Convert()
 {

     string json = GetComponent<Text>().text;

     JsonUtility.FromJson<Play>(json);

 }

}

Me lanza este error:

ArgumentException: Cannot deserialize JSON to new instances of type 'Play.'