{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7d373105c6644ed0379db23188e2487937f99800416f3294014779b91b5ecf83",
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    "signer": "0xa31335946FFa989Bc175B4A200cC3215EB94987A",
    "userId": "883667445"
  }
}