{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x594b71d3aaa3bac391d792a150f9ef9e87d100e5fa10c6bcd1f532b8d8175d48",
    "signature": "0x01f9086e0b6a434a857ea43f5dbab0270a305f686ec321ecd0aa23f52a55045c26864db23fda79acd47ec2a55f1b328fd6b5131203d6ebf71fcc0fc36a1e83c71c",
    "signer": "0x0bca925B84aa09b17BB9A338B5fb37b2dd7F8cD4",
    "userId": "189474"
  }
}