{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x553a3d2fae268a196a5ea0cb679a8bb3a749c357b9d5d533290b9a4098082a97",
    "signature": "0xeca25131df822011c844a263500a6803aabd9af736b2142dc2da9456cf42a8ce776273f7dd86fbe7faa1f6f296ef4075a8328dda7b912ca27166705dbbc8ba8d1c",
    "signer": "0xd058Df91627cEe362CD4c5Cd9669b6bC4DaD6D0D",
    "userId": "883005562"
  }
}