{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x765ca7c3f231799ecaec6ff24b1178cdff544b72d6a680cb139028905d78001f",
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    "signer": "0x5B24A34Ec733B1B44FbC765802F01944320e82f4",
    "userId": "716881751"
  }
}