{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6af52edf172e89a9568e25eaa7884532f6925009dc68174be269067c93662d8c",
    "signature": "0xd630da7af05672138260eb5f30679170c6a4749c656bcb8cab018402ab7068a975ab368774cd42d1c335566f060c2663e429e5bcd2146ee6d7b51d135610b02f1b",
    "signer": "0x530FAbE17DCf39F21fF28C09C454943CE483816D",
    "userId": "140097"
  }
}