{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0faac7fb1ec894155b9fac58f007e2f2246017672449a69486abc6a20f9c4820",
    "signature": "0xbb0442d127fee6d5f51493cd8122c08d3fe9dfc9dd56c4a7879795fe788e2f6c171e99715b083626b3f16da7c84ce567c033d9fe76163362cb856dc8155cfb931c",
    "signer": "0x2CdceEeabf6dc8403D306e7C20eD1Bc4F95f13cE",
    "userId": "373173"
  }
}