{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9f0daf26003701645cf5186756c165e4224063be3986c3a3165c0e1398ff9d79",
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    "signer": "0xBCf6e47632dAEE8edBaCE056A9322bDb09EDBa4E",
    "userId": "282228420"
  }
}