How to store GeoJSON in PostgreSQL - json

Question

I'm trying to get a JSON formatted like GeoJSON with API. I get something for GET and can DELETE but when i try to post or put i get this error System.NotSupportedException: Deserialization of reference types without parameterless constructor is not supported. Type 'System.Text.Json.JsonDocument'
Also I'm not getting exactly what I have in PostgreSQL. There is an extra "rootElement"
In PostgreSQL I have a table with columns ID(integer),type(string),properties(json),geometry(json).
I insert this
{
"id": 1,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [23.2,23]
},
"properties": {
"name": "test2",
"type": "testing"
}
}
And this is my class
public class Test
{
public long ID { get; set; }
public string type { get; set; }
public System.Text.Json.JsonDocument geometry { get; set; }
public System.Text.Json.JsonDocument properties { get; set; }
}
What I get with GET is this
[
{
"id": 2,
"type": "test",
"geometry": {
"rootElement": {
"type": "point",
"coordinates": [
23.2,
23
]
}
},
"properties": {
"rootElement": {
"name": "test2",
"type": "testing"
}
}
}
]