--- ENDPOINT ---
chat.ChatService/SendMessages

--- REQUEST ---
{
  "from": "Alice",
  "text": "Message 1"
}
--- REQUEST ---
{
  "from": "Alice",
  "text": "Message 2"
}
--- REQUEST ---
{
  "from": "Alice",
  "text": "Message 3"
}

--- RESPONSE ---
{
  "status": "OK",
  "count": 3
}
