JSON message about detection line list
{ "LineItemList": [{ "LineItemInfo": { "lineID": , /*required, int, detection line ID*/ "enabled": , /*required, boolean, whether to enable detection*/ "sensitivityLevel": , /*required, int, detection sensitivity*/ "directionSensitivity": "", /*required, string, detection direction: "left-right" (from left to right), "right-left" (from right to left), "any" (all directions)*/ "LineItem": [{ /*required, parameters of a detection line*/ "x": , /*required, float, x-coordinate, its value is between 0.001 and 1*/ "y": /*required, float, y-coordinate, its value is between 0.001 and 1*/ }] } }] }