Laravel udate record with Passport

Hy guys, today i have this problem with my api. I don't update the record on DB. In postaman the response is true but don.t save in db. In Postaman i passed with PUT method and set in Body name a text

ProductController:

public function update(Request $request, $id)
{
    $product = auth()->user()->products()->find($id);

    if (!$product) {
        return response()->json([
            'success' => false,
            'message' => 'Product with id ' . $id . ' not found'
        ], 400);
    }

    $updated = $product->fill($request->all())->save();

    if ($updated)
        return response()->json([
            'success' => true
        ]);
    else
        return response()->json([
            'success' => false,
            'message' => 'Product could not be updated'
        ], 500);
}

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