{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x76816f92f1ee81e60605164a4545b57910fbe2eed13d12e357a4d3783f71f0aa",
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    "signer": "0x6e54F0D5BD2A9b915DFf8388cC7Bf03b9cDF7669",
    "userId": "192813938"
  }
}