{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x22aa99603540e1d1e9495abc926714670e754abdefc30b3b635abcc177dc2f23",
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    "signer": "0x4ABD89991f78a0c9155AbBA7F8EA2e86442Bf33F",
    "userId": "404080337"
  }
}