{
  "manageEntity": {
    "action": "Save",
    "entityId": "2111142770",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7b68e8a505f0aa3f787967e6ffee34fc5dd5e1be24e029bdc3bb903d7c0d9660",
    "signature": "0x90454258177b355f710d29cf605e76bb4b630968c23d09a954331f98994f6da6017604c6d6821065cea2cd65cf16242ff5b6349cd5e26613b7d976c7758a14931c",
    "signer": "0x2b012Ef37cb9315271f0AC801DBbec07c0D4578d",
    "userId": "506789556"
  }
}