{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x010cbc33c954160f76b2ff161c4fd4c068eb10170d9746416e6e9e4fd5fe64e3",
    "signature": "0x6ae54bd74015cfbaeb43f42b8d784b3323383585ac9c8eea0a12a1d02ca499df460d048dc48dfe35d8b60bead794a863b7f5a1c381dd4ad9a3133f02513f30f71b",
    "signer": "0xe7e47058Ef107Dd487fb56Be1b71921Fc239fA0c",
    "userId": "943161575"
  }
}