{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfeb67879205a420fa290ce573e4cc39318377139748074f6ce242896d9f193a0",
    "signature": "0xdb7f370bfc68617f4591028d0a3488bde6c4192e274b039e199f63f33015bf374da4255d82d772989226c7d3832ee2aabe5b17740621288d9b3368338c9d8a591b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}