Changes to POST /v2/sar/connections

the request's body type changed from object to no type

removed the request property callerAddress

removed the request property currencies

removed the request property expectedPayeeIdHash

removed the request property payeeHandle

removed the request property paypalEmail

removed the request property platform

removed the request property returnUrl

removed the request property state

added subschema #1 subschema #2 subschema #3 to the request body oneOf list

added the new required request property payeeHandle

added the new optional request property paypalEmail

added the required property responseObject/url to the response with the 201 status

endpoint added