{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x00cfc7b63bc99ecb364343b7f8f7a4104bb69377830c68358af5a2b35657d989",
    "signature": "0x96119838935f34a5aba3a425aa5dcd3a732cdeff45dc42aee44110ef2e0a71c515226f1b6633afef6bc4b29d92c35a1d01f0cc35e3011301cf069fa6d07bc8661b",
    "signer": "0x3C912CfA5368616F0DC7e770cc50D75877Ae7824",
    "userId": "276602226"
  }
}