{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcf942d67305ece2708caeb4a1d7548b6aeec5cd12e8da3ff5eadc7ec1d2d34f5",
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    "signer": "0xe4c2298ACE4151A9700662c2A228EEC7735F27cb",
    "userId": "375150907"
  }
}