{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2a8deac7e9b40a8a6f289f4f77454266a156d98f27f2050315de107048e19568",
    "signature": "0x80104aad0070dcca2589f717c639fcea074d4884aa5049185dda5b0e06ed2f78721ac090dbf4923b1da37b3a44ea330a095bfa4f419b2a510cc5ed18348efd641c",
    "signer": "0x7964a5eF7E9a780013d3886B40ca04443D69588D",
    "userId": "224019652"
  }
}