{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0a7819440e0709241b017db33452eba0060385b4c0b560cc993bb46d6f0ccd45",
    "signature": "0x43d38da0ffc962839a54b1a35aa064a552dcd885e658fea474f9e2f8248ec9bc228ed82aa681ed8d4f096b08f2e59d928ea40c695beef703ff71705002fd32a61c",
    "signer": "0x771Ea061Fa0D229A49cd7b74921CA6D304879482",
    "userId": "115980928"
  }
}