The Map schema is used to define maps of key values within OpenWhisk entities.
{ <key_1>: <value_1>, ..., <key_n>: <value_n> }
# Where ‘key_n’ is a type <string> and ‘value_n’ is type <any>. <key_1>: <value_1> ... <key_n>: <value_n>
alert_levels: { “high”: “red”, “medium”: “yellow”, “low”: green }
alert_levels: “high”: “red” “medium”: “yellow” “low”: green