{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6cec5fe4e04e13a64aed40c99300672b626c785af3b018cdba79b51fc904ea00",
    "signature": "0x57562f968ab2d72bf6aac8b2aab1f3deff1fd23e59f51bd9e30a605b3fc6e01f4b9c875a0c2592a05462fe15612bff2d1acabcf878c41c10d4bfe56b74de51dc1b",
    "signer": "0x5Bc05b706D3864d34607f61EB1cb128EEf4453b8",
    "userId": "673773101"
  }
}