{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8c7b81acb45106ed02e05e25f12ac67131b5cf3ced54e0d6b9360a8ced4c9951",
    "signature": "0xef40ccf70b4449312776b4dc89aa6469850974777c50ee3d6844021f7415fe6971c9e250aa31b46bb75de98f0c20e83df23d7c002cfe6e0c69b86c10979469481b",
    "signer": "0x89715A6F0c23C84cE71166083899D25bE26BfBC1",
    "userId": "952196459"
  }
}