You can use the ReviewServices.getComments call:
[{"command" : "ReviewService.getComments",
"args" : {
"reviewId" : "11" }
}]
As a result, you will get a comment with the '"type" : "NOTE"' type:
"result" : {
"comments" : [ {
"location" : "14.xml, Annotation",
"type" : "NOTE",
"creationDate" : "2018-03-19T12:04:27+03:00",
"text" : "Comment in the "Notes" field",
"creatorInfo" : {
"name" : "Administrator",
"login" : "admin",
"userId" : "1",
"email" : ""
},
"conversationId" : 8,
"commentId" : 16,
"reviewId" : 15
}
All other comments have the '"type" : "User"' type.
I hope this helps!