{
  "InstanceId": "a1b2c3d4-5678-90ab-cdef-11111EXAMPLE",
  "ContactFlowId": "a1b2c3d4-5678-90ab-cdef-77777EXAMPLE",
  "Attributes": {
    "key": "value"
  },
  "ParticipantDetails": {
    "DisplayName": "Jane Smith"
  },
  "InitialMessage": {
    "ContentType": "text/plain",
    "Content": "Hello, I need help with my order."
  },
  "ClientToken": "a1b2c3d4token",
  "ChatDurationInMinutes": 60
}