const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    agent: {id: '<string>'},
    messages: [
      {
        role: '<string>',
        content: '<string>',
        tool_calls: [
          {
            id: '<string>',
            name: '<string>',
            arguments: '<unknown>',
            response: '<unknown>'
          }
        ],
        time: '2023-11-07T05:31:56Z'
      }
    ],
    state: '<string>',
    additional_data: {},
    finish: true
  })
};

fetch('https://blackbox.dasha.ai/api/v1/text-chat/completion', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "messages": [
    {
      "role": "<string>",
      "content": "<string>",
      "tool_calls": [
        {
          "id": "<string>",
          "name": "<string>",
          "arguments": "<unknown>",
          "response": "<unknown>"
        }
      ],
      "time": "2023-11-07T05:31:56Z"
    }
  ],
  "state": "<string>",
  "is_final": true,
  "chat_id": "<string>",
  "call_id": "<string>"
}