{
  "manageEntity": {
    "action": "Save",
    "entityId": "41440323",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa00cef7b06d9c2167cdad75af79f982c6ecf00b6f94435c5eee35a994b8e1a52",
    "signature": "0x527e067e73ee85d8df70810db631dd6ef6005903901fae6635b594dd0c6b2bf1652ff8ccea5225bd0d47b6d906ed421599ca9aa893f93b0947db0240e82047a11b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}