{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2877250ee54d297c6cee1bdbc62e810291b1e7be0693a4e121421741d9943b60",
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    "signer": "0x115FdE94990D7AAb2784D373eBCEbc3cF1014bAa",
    "userId": "365503940"
  }
}