{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x77d13251f103d6ce7cced946c559a8d46df921450b8395e2b12425ddba5576e1",
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    "signer": "0xC3D7132e0492acFCD48339ED8998A1E34E575134",
    "userId": "820257716"
  }
}