{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa3fc897db8eb5ad2cb1e85c4f7b5197769060e7013aea348fe98f1d62d193d43",
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    "signer": "0xfC17Fc8798beaE2f98ee6Bd874e12e6A904a23C5",
    "userId": "384940783"
  }
}