PHP create a json response from php to look like stripe api result

I need to create a json response to look like Stripe API response using PHP. This is the structure I want to get:

{ "body": "{n "error": "Please enter a valid secret key",n}n", }

This is the code I have so far:

first I create the array:

class Error {

    public $errors = array(
        'body' => array( 'error' => false ),
    );

    if ($this->errors['body']['error'] === false) {
        $this->errors['body']['error'] = 'Please enter a valid secret key'
    }
    
    $resp = json_encode( $this->errors ) 
    echo wp_send_json( $resp );
}

but the result I get is: json_encode result:

{"body":{"error":"Please enter a valid secret key"}}

echo wp_send_json( $resp ) result:

res = "{"body":{"error":"Please enter a valid secret key"}}"

I don’t want the body to be encoded. What am I missing?

Answer

It looks like only the data is json_encoded with the error…

$this->errors['body'] = json_encode( 
             ['error' => 'Please enter a valid secret key']);

This won’t have the newlines in it, see if that is a problem.

Or to do this at the end (useful to include that you need this in the question)…

$resp = json_encode( $this->errors['body'], JSON_PRETTY_PRINT );

echo wp_send_json(['data' => $resp]);