{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xff17ad8499df497b9bc8b42ccee13c6301a4e00d54f2552aaf16e5cf04828241",
    "signature": "0x4285478f4e670c16ccaabece350be8fa531b21040d9c956500b675b5f898c6ac2557cad0ec1703dbc31134dabfae973dda5088e486a48746776d7f41de3c1ba61c",
    "signer": "0x4aAcD7111AAC42E77259a6cc44Bc93dc074A476B",
    "userId": "60730085"
  }
}