{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x565fee589344d56c271a899dd7a8cc281c21e66592c61359217c49d769da6666",
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    "signer": "0x5AbCEAe498b9A67266FF7D216A99c3eA08718757",
    "userId": "436263444"
  }
}