{
  "manageEntity": {
    "action": "Save",
    "entityId": "1577292845",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf103314dca07a4d2834d97c6ef5208eda349b2130fa9ad271aa30ad5958a10a7",
    "signature": "0xdac4a028dfb6ed7dc142def40e3f45e792b57901c149dc87ef58500354deefda7535382d2b8080af105ab5030d9b51032275436d10cc8065b1362c90a84d34131c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}