wrong JSON format response in REST API

i have built a custom module to get Faqs in a REST API.

but the json format not return as what i need!

Expected Result:

   {
    {
        "faq_id": "1",
        "category_id": "1",
        "question": "What is Lorem Ipsum?",
        "answer": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen boo",
        "sort_order": "0",
        "status": "1"
    },
    {
        "faq_id": "2",
        "category_id": "1",
        "question": "Why do we use it?",
        "answer": "It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters",
        "sort_order": "0",
        "status": "1"
    }
}

Current Result:

[
    {
        "faq_id": "1",
        "category_id": "1",
        "question": "What is Lorem Ipsum?",
        "answer": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen boo",
        "sort_order": "0",
        "status": "1"
    },
    {
        "faq_id": "2",
        "category_id": "1",
        "question": "Why do we use it?",
        "answer": "It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters",
        "sort_order": "0",
        "status": "1"
    }
]

the issue is in this “[“

my code:
API Model:

/**
     * {@inheritdoc}
     */
    public function getFaqs()
    {
        $collections = $this->collectionFactory->create()->addFieldToFilter('status', ['eq' => 1]);;
        $result = $collections->toArray();
        return $result['items'];
    }

interface:

interface Faqsinterface
{
  /**
     * GET for Post api
     * @param mixed
     * @return array
     */
    
    public function getFaqs();
}

kindly advise, what should i do to solve it?