curl --request POST \
  --url https://api.mountsea.ai/eleven/plan \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "prompt": "An upbeat pop song about summer adventures",
  "musicLengthMs": 180000,
  "sourceCompositionPlan": {
    "positive_global_styles": [
      "epic orchestral",
      "cinematic"
    ],
    "negative_global_styles": [
      "lo-fi",
      "acoustic"
    ],
    "sections": [
      {
        "section_name": "Verse",
        "positive_local_styles": [
          "soft piano",
          "building tension"
        ],
        "negative_local_styles": [
          "heavy drums"
        ],
        "duration_ms": 15000,
        "lines": [
          "First line of lyrics",
          "Second line"
        ]
      }
    ]
  },
  "model": "music_v1"
}
'

{
  "taskId": "<string>"
}