The "verticesAsJsonString" parameter must be a stringified JsonArray object containing the polygon vertices.
These vertices must be JsonArray objects too, and must contain the latitude first and the longitude second in the WGS84 projection.
Therefore, the latitude value must be between -85 and +85 and the longitude one must be between -180 and +180.
You need at least 4 vertices to make a polygon and the first and the last vertice must be equal in order to close the polygon.

You can see an example of a valid "verticesAsJsonString" parameter for a polygon in the above parameters description.

If successful, this method adds a polygon to the mapdata defined by the "mapdataName" parameter and returns a 200 HTTP response containing the newly added polygon key.

Date Type Attribute if add a geometry with a date type attribute. Date value format : dd-MM-yyyy (example 12-02-2016)