i have this json which returns me by logging a request.body in react, using this data:
2023-05-30 13:55:53 │ backend    │     accepts_marketing: 'false',
2023-05-30 13:55:53 │ backend    │     email: 'marius.placinta@catenate.com',
2023-05-30 13:55:53 │ backend    │     first_name: 'Marius',
2023-05-30 13:55:53 │ backend    │     has_account: 'true',
2023-05-30 13:55:53 │ backend    │     id: '6994483380508',
2023-05-30 13:55:53 │ backend    │     name: 'Marius Placinta',
2023-05-30 13:55:53 │ backend    │     tags: '',
2023-05-30 13:55:53 │ backend    │     discount_amount: '',
2023-05-30 13:55:53 │ backend    │     discount_application: ''
2023-05-30 13:55:53 │ backend    │   },
 i need to write a POST method which has in the body the request.body and some other data like this: customer: 
{
  "first_name": "fabio",
  "last_name": "filzi",
  "email": "fabioRew3.ferri@gmail.cg",
  "phone": "+344566778",
    "grants": [
    {
      "reward_id": 56,
      "is_balance": true,
      "amount": 100,
      "expiration": "2023-09-01T07:59:59.000Z"
    }
  ]
} 