{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x177b31155d194f1ffb0cc879b0bff27395c7e9a3cceab9fdda95ad7161e4683b",
    "signature": "0x0574b78889bee8c85d002249ff679d91dd5bd160cc2c26247ec7ce91a2527a651756284658b7315d0decf843ae6a12ebfe7f4346761443368e1076a814c437831c",
    "signer": "0x2C5Fb82Dc50d50e897e4954a941Bb8234A68Bb15",
    "userId": "881563266"
  }
}