{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x37686d5695da333b6680d6cdf6e4d44bc95fb5e667ad5fc79b7ecd6da1887814",
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    "signer": "0xa2487B830EF7e6771fDBba17De727FfB50423ea3",
    "userId": "92751028"
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}