{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x05453bc04cbfed7bdc5fc2ea33e5ed58ad11d81f4203464292309185a55c99e3",
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    "signer": "0x5183F6e0300007e994a67bba9e2875303ac6dfad",
    "userId": "172638853"
  }
}