{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x501cc3abf634ee770e731a9c66baa4ca095de07396d8528f93c9dbdf477c30f7",
    "signature": "0x9bf4ab822236c27f5ec2aea356777d69ab8422216957cdc4da7c60b5d7d9671f7d02f7df59d7aea09e02e66df069bc4588980bad59e6fc5afcbb8ab41f1dd3a81c",
    "signer": "0x6aa3E2bE2AB45Fc2Ad5686BceE8143d03636F391",
    "userId": "89723135"
  }
}