{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa8fe4372d4ddf943411f5cbe4899722d9c983c0346bd62967073c03f611121ac",
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    "signer": "0xffB35A7fb70de85Fc6641863EDD49bA203945e57",
    "userId": "816796520"
  }
}