{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x29b1be562e74fe4b94c33b0559ad31f9fc0ed01b3648525162a1838061ad8199",
    "signature": "0x0faf47259c4ee8b13e2456545446f590fb1bf8d2706be9dff4185f4ae402de281582c1ea3795738ab86cbab9bb33419f4083d9c54fb4ef989b0bdcfc656ac0c61c",
    "signer": "0x0682FD8127DA6dA5652628b34f64eb56f20fb556",
    "userId": "7028309"
  }
}