{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa7e0ac9e9ed5d99b906d74526be47bc735624ecb7a2ca511b6b33b1bcafef6f5",
    "signature": "0x59b0d76914870f4583574a50ec06be961c75e719b1bbefbd8bb5125a3421d1f83c09077d5c4284e328c3bf2717a8f757b8699d48fd86dee9ed081b777f700a631c",
    "signer": "0x33F2ea0d831035543988062c41560F575f299Df6",
    "userId": "770632822"
  }
}