task/received/get - Returns a single existing received task.id - The ID of the received task to get.{id: <number> - The ID of the received task.sender_username: <string> - The username of who sent the task.text: <string> - The text of the received task.deadline_time: <string> - The Unix timestamp of the deadline of the received task.tags: <string> - The space-separated list of tags.top_priority: <boolean> - Whether the received task is marked as top priority.insert_time: <number> - The Unix timestamp of when the task was received.}RECEIVED_TASK_NOT_FOUND - A received task with the ID doesn't exist.