curl -X POST https://api.mountsea.ai/suno/v2/mashupLyrics \
-H "Content-Type: application/json" \
-H "Authorization: Bearer your-api-key" \
-d '{
"lyrics_a": "[Verse 1]\nWalking down the street today\nSunshine lighting up my way\n\n[Chorus]\nFeeling so alive, feeling so free",
"lyrics_b": "[Instrumental]"
}'