{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4d69a49dc017bfc2f9d6c0768647bf3307043fc140dfcb32d3c6ba359344446c",
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    "signer": "0x1A81b9e556cD3FE98A741c33EE64C55cDA2FdAfa",
    "userId": "472536516"
  }
}