{
  "manageEntity": {
    "action": "Save",
    "entityId": "1881282410",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf5fa3d48af9fbf802222b9ed462088bfcb28c65d457ac717296b7d032eaa102c",
    "signature": "0x4c32cb1c7956d650fd7f0e74103e2c9f1e5bf089ed71ac1d0603857273c1fb2a3d8ea9262639b27d49666049885ea4e33ed3da376d1d3fec84f7484432ad3b0c1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}