{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6c6f8d67470d71a83b52718e90e9a759dd2391f863737a3dea85452ec6865929",
    "signature": "0x0c3b316cbad829b5b7cdb0623ffa00af8412a4b4b6c0b40a2e2d5c7823b4fa107ad5bf987e789c76958298107bdc5bb456a1771c16e34321643c3ce91dabc4ae1c",
    "signer": "0x375Cb810064a8664498e1BB09Ac3547D48e943e2",
    "userId": "597883261"
  }
}