{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5e0ae6806f030ac01313ccc1fe03024b3a5368be7fea4418f3d345d7847ba808",
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    "signer": "0x87e4380306024d22309CBb70efB443AC8aE372Fa",
    "userId": "308100838"
  }
}