{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc8f11c9c6f6146aa08407fbd06e7fc4eb4a5897b4e532053828efc6220fa0b82",
    "signature": "0x75f677e18641ec2c07d87f64e995bf2678ff723a2fefea893b1b3b1ecba3d1d179d73e4631fe11d86e1bd32164ba5bfe5122b4403201f609d86dcab31bbdf9121b",
    "signer": "0x4383f6c4dA607Dc75651D8AfAB96d6bC02986aD4",
    "userId": "402833381"
  }
}