swagger file for all possible 'properties' - rest

Question

I need to call an API to load data on an ongoing basis. API returns different properties for each event. When I create the swagger file it has properties from sample return, but in the long run there will be more properties which can be added by the source system and they will not be in swagger file.
Is there any way to recreate swagger file before data load dynamically with additional properties?
Swagger file is generated by Informatica Cloud based on a sample return while testing the connection.
Properties list has a different number of entries based on event type.
swagger file:
{"swagger" : "2.0",
"info" : {
"description" : null,
"version" : "1.0.0",
"title" : null,
"termsOfService" : null,
"contact" : null,
"license" : null
},
"host" : "<host>.com",
"basePath" : "/api",
"schemes" : [ "https" ],
"paths" : {
"/2.0" : {
"post" : {
"tags" : [ "events" ],
"summary" : null,
"description" : null,
"operationId" : "events",
"produces" : [ "application/json" ],
"consumes" : [ "application/json" ],
"parameters" : [ {
"name" : "script",
"in" : "query",
"description" : null,
"required" : false,
"type" : "string"
}, {
"name" : "Authorization",
"in" : "header",
"description" : null,
"required" : false,
"type" : "string"
} ],
"responses" : {
"200" : {
"description" : "successful operation",
"schema" : {
"$ref" : "#/definitions/events"
}
}
}
}
}
},
"definitions" : {
"events##properties" : {
"properties" : {
"$app_build_number" : {
"type" : "string"
},
"$app_version_string" : {
"type" : "string"
},
"$carrier" : {
"type" : "string"
},
"$lib_version" : {
"type" : "string"
},
"$manufacturer" : {
"type" : "string"
},
"$model" : {
"type" : "string"
},
"$os" : {
"type" : "string"
},
"$os_version" : {
"type" : "string"
},
"$radio" : {
"type" : "string"
},
"$region" : {
"type" : "string"
},
"$screen_height" : {
"type" : "number",
"format" : "int32"
},
"$screen_width" : {
"type" : "number",
"format" : "int32"
},
"Home Step Enabled" : {
"type" : "string"
},
"Number Of Lifetime Logins" : {
"type" : "number",
"format" : "int32"
},
"Sessions" : {
"type" : "number",
"format" : "int32"
},
"mp_country_code" : {
"type" : "string"
},
"mp_lib" : {
"type" : "string"
}
}
},
"events" : {
"properties" : {
"name" : {
"type" : "string"
},
"distinct_id" : {
"type" : "string"
},
"labels" : {
"type" : "string"
},
"time" : {
"type" : "number",
"format" : "int64"
},
"sampling_factor" : {
"type" : "number",
"format" : "int32"
},
"dataset" : {
"type" : "string"
},
"properties" : {
"$ref" : "#/definitions/events##properties"
}
}
}
}
}
sample return:
"name": "Session",
"distinct_id": "1234567890",
"labels": [],
"time": 1520072505000,
"sampling_factor": 1,
"dataset": "$event_data_set",
"properties": {
"$app_build_number": "900",
"$app_version_string": "1.9",
"$carrier": "AT&T",
"$lib_version": "2.0.1",
"$manufacturer": "Apple",
"$model": "iPhone10,6",
"$os": "iOS",
"$os_version": "11.2.6",
"$radio": "LTE",
"$region": "Florida",
"$screen_height": 667,
"$screen_width": 375,
"Number Of Lifetime Logins": 2,
"Session Length": "00h:00m:08s",
"Sessions": 43,
"mp_country_code": "US",
"mp_lib": "swift"
}
}