Making a post call with a payload in body from postman to the HTTP url from Azure logic app. I am trying to pass a variable dynamically to the logic app to execute a query. I defined schema in the request body schema section in logic app. Also a payload in the postman body. I am receiving an error: "error": { "code": "InvalidRequestContent", "message": "The request content is not valid and could not be deserialized: 'Unexpected character encountered while parsing value: a. Path 'AccountId', line 2, position 18.'."

Request Body JSON Schema in logic app-

{
    "kind": "Http",
    "inputs": {
        "schema": {
            "properties": {
                "AccountId": {
                    "type": "String"
                }
            },
            "type": "object"
        }
    }
}

Postman payload:

{
    "AccountId": [{{MemberId}}]
}

Content type is defined under header section to application/json The workflow in the logic app is as follows: enter image description here

Need to pass the memberid from postman to AccountId in Azure logic app. The query in logic app uses AccountId to execute the query