{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7d119092ac32a3066ee1c4d5354a28200c074d42eefc403b9342ac2cb5542f30",
    "signature": "0x070ee7bf5ec946364a6d43aaf58e2af0633aa7dfce4e2c38384456125c256ee0675ae8569d9575096fdcdda01ed2f7abe49cab24b2e877a712e9b934aadeb8501b",
    "signer": "0x984Ca9e437Fdc1dfe3c0eeD0Fdd687755237E8B0",
    "userId": "236822238"
  }
}