Issues Making a Post API request

[kanibaba1]

I’m stuck at a seemingly easy step, i’ve been since friday…i’ll apreciate a quick help here.

So i’m trying to call a post api using dynamic contents to make up the request body as shown in the image… but i keep gettimg this error message belllow

Status code 400
{“error”:{“code”:“InvalidRequestContent”,“message”:“The request content is not valid and could not be deserialized: ‘Unexpected character encountered while parsing value: E. Path ‘first_name’, line 2, position 13.’.”}}

[Jici]

You have missing double quotes around your parameters. Should be “<first_name>”
Also, be sure to put header for Content-type: application/json

[kanibaba1]

I thought the angle brackets replaced the quotes… thanks a lot…you have no idea how much I’ve battled with this😩