{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xea64ce92a3ae971291c7b1be173d5ed14ae42c74e8e72b6ba5e815a46f030714",
    "signature": "0x6fd26e14394d2eb3a0f9bb23bc8e904cf406a4a23712e7950e1de1fc76cf9a3965909e64cf0ebfbe6e3f2f7c368f2c33266f276161ef45ac43471211a8dc0f721b",
    "signer": "0x7096C266e897109B09BB8e3fD737182dc82D386f",
    "userId": "472091939"
  }
}