{
  "manageEntity": {
    "action": "Save",
    "entityId": "513255298",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdffcf0eb9ed62354b2a1540be3fc37c63e12aa78191920f29ff77e825c28c30d",
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    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}