{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb9245754347788273f54e5ec901b526535c7f0a063f7e8b6350cd261686c1741",
    "signature": "0xbbf830f8383a4ad7db40bd481e5e8edf00c41184de534dfb88e6f4a27dd8971e6da00ea650ea862bd5202d18aff05a599375bd7cbfc9f72660ce401cae6e52b51b",
    "signer": "0x3a15267Aef121Df06ab1920d9f4089762a1450c4",
    "userId": "93259889"
  }
}