{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd1dbf93a1837a25237a2499bc999335c244f8292710e1625755b15b0c28c11a1",
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    "signer": "0x8D89002a0b137EAA7036d87693210357CFF9d38E",
    "userId": "329799320"
  }
}