{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896538700",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x80333963b59f7f5802da836d9475d32a6422716137755414104f36a8f6686802",
    "signature": "0xfe8ce675c203d1582837670626136818e6efd258526594753374c23a3ff90c3d4be0bb40de720bd0158824dcd2ded2c3eb2a9f56ae995fd4a502b65780d54d371b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}