{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x807c8230907dc99c2b0615835d5e939f061abc3816cc606ad9fe7680075c211a",
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    "signer": "0xFa2dBCb92930D97D2aE1d8Bc7da6EAda5bd4E129",
    "userId": "981230458"
  }
}