{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4c12082bfbf9c00b47113a6874700e9a0ed450508d8b5b1629bb1638452e9668",
    "signature": "0xc46c71479c925179cfa19e1baf6ac881a7016ce20657f28c337c8b51a3891ae9335a71e05d76c7e27d50012970d85d9ed76494e1fcdaefbf301d7eb2dbc47b5d1b",
    "signer": "0xca49c4376F1D495D19DCA58991553F1fd0fF05AB",
    "userId": "37684323"
  }
}