{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6bca62ebf103555d4d4ebd6245a7cf902db8ca260c980efdf9e3de0ca42540e1",
    "signature": "0x5ee49bd07444f82882a1c1e0b28c7210fb144b3efc7d1a60cf350e6662ab1f7e141966d38d08f0672ab1a8f88c9916791f3937ea69ad279dca1c7d82b1b7cfc11b",
    "signer": "0xEeE12Ae1A72f1A28574A40111a31BB81B1CE0602",
    "userId": "105387530"
  }
}