{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x94529ff66bec85c161b13d4922a9b12aa119bce2d3bff4c42cc1be360b7b1f12",
    "signature": "0x572f7e637ffb9dcbac73f40e00546deaa731f703661c47dae7d4229f1019240534c0209568fdbbd786426e834440091c7a6b681b827fa5e551856bff09da6bde1c",
    "signer": "0x552Ae3d6606d1ea506Aa710a950Da685E4D9e2c7",
    "userId": "917959466"
  }
}