{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdbbc56e6968a10bb477526237704b15803198dccecbe911659d50ff56123f09b",
    "signature": "0xcc005964ea2507df7f07a0ae0682066e27f13f739435c1b61f5807748c13600b64362e3e1d2f13b6f2c4e44816912f5b28b5c0cf00f4edfcc0dca833980f51081c",
    "signer": "0x3A9bD85F5379a7f7B599d40E92690178652B8f3d",
    "userId": "429081221"
  }
}