This is 4 values on the x axis and 1 value on the y axis
{"c2array":true,"size":[4,2,1],"data":[[["left"],[180]],[["right"],[0]],[["forward"],[-90]],[["backwards"],[90]]]}
It looks like your using the x/z axis'.
{"c2array":true,"size":[4,1,2],"data":[[["left",180]],[["right",0]],[["forward",-90]],[["backwards",90]]]}