{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1733be6fdf7c533bd6bc820b1163524bb50d6b6395fd5abbb9639c13d509d4ca",
    "signature": "0xe3a67b309e2b4b9a3ff7c92a78e51f933af74de1dcab2eb241fc8c377df7fdaa0f9cc0457b84b17cfec7034dd750c550da19cbf7e795c0cb7adc5d3c107f091e1b",
    "signer": "0xBCa8DBA02e5d025416Ad3a7487bB184bc45c7533",
    "userId": "652541246"
  }
}