Assistant: 
User: User: write me ONLY this{
    "timeline": {
        "background": "#000000",
        "soundtrack": {
            "src": "https://s3-ap-southeast-2.amazonaws.com/shotstack-assets/music/moment.mp3",
            "effect": "fadeOut"
        },
        "tracks": [
            {
                "clips": [
                    {
                        "asset": {
                            "type": "text",
                            "text": "Exoplanet GJ 1214 b"
                        },
                        "start": 0,
                        "length": 3,
                        "transition": {
                            "in": "fade",
                            "out": "fade"
                        },
                        "position": "center"
                    },
                    {
                        "asset": {
                            "type": "text",
                            "text": "Size: 2.6 Earth radii
Distance: 40 light years"
                        },
                        "start": 3,
                        "length": 4,
                        "transition": {
                            "in": "fade",
                            "out": "fade"
                        },
                        "position": "center"
                    },
                    {
                        "asset": {
                            "type": "text",
                            "text": "Surface temperature: 230°C"
                        },
                        "start": 7,
                        "length": 4,
                        "transition": {
                            "in": "fade",
                            "out": "fade"
                        },
                        "position": "center"
                    }
                ]
            }
        ]
    },
    "output": {
        "format": "mp4",
        "resolution": "hd"
    }
}

User: Error: 400
{"success":true,"message":"JSON could not be parsed. Please check the submitted request is valid","response":{}}
CORRECT THE payload VALUE, DO NOT WRITE ANYTHING IN YOUR REPLY BUT THE NEW VALUE of payload
User: Error: 400
{"success":true,"message":"JSON could not be parsed. Please check the submitted request is valid","response":{}}
CORRECT THE payload VALUE, DO NOT WRITE ANYTHING IN YOUR REPLY BUT THE NEW VALUE of payload
User: Error: 400
{"success":true,"message":"JSON could not be parsed. Please check the submitted request is valid","response":{}}
CORRECT THE payload VALUE, DO NOT WRITE ANYTHING IN YOUR REPLY BUT THE NEW VALUE of payload
User: Error: 400
{"success":true,"message":"JSON could not be parsed. Please check the submitted request is valid","response":{}}
CORRECT THE payload VALUE, DO NOT WRITE ANYTHING IN YOUR REPLY BUT THE NEW VALUE of payload
User: Error: 400
{"success":true,"message":"JSON could not be parsed. Please check the submitted request is valid","response":{}}
CORRECT THE payload VALUE, DO NOT WRITE ANYTHING IN YOUR REPLY BUT THE NEW VALUE of payload
User: Error: 400
{"success":true,"message":"JSON could not be parsed. Please check the submitted request is valid","response":{}}
CORRECT THE payload VALUE, DO NOT WRITE ANYTHING IN YOUR REPLY BUT THE NEW VALUE of payload
Assistant:
Assistant: