{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x744f1f101ca040a650243b58a0eabf204740831d5f4884745fa8ca422772b7ab",
    "signature": "0xae6a99f64b1dced9e432413b20ced8ddba2ccc2a9b3ac301d673eef4f22121607df8ca6c53b54891034e9b721eff8a0f38ea2b572468f82e58c076012680dba51c",
    "signer": "0xe1E4dcac3fc9927b3C387D00a5E05Bf32a491482",
    "userId": "714916115"
  }
}