Write the Python code to parse hl7 message into JSON. Split the message by the fields (|), components (^), and sub-component (~). And position each element according to its structure.

Example:

MSH|^~\&|GHH_ADT||||20080115153000||ADT^A01^ADT_A01|0123456789|P|2.5||||AL EVN||20080115153000||AAA|AAA|20080114003000 PID|1||566-554-3423^^^GHH^MR||EVERYMAN^ADAM^A|||M|||2222 HOME STREET^^ANN ARBOR^MI^^USA||555-555-2004~444-333-222|||M NK1|1|NUCLEAR^NELDA^W|SPO|2222 HOME STREET^^ANN ARBOR^MI^^USA