{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x74a8c6006cdae23b7eb19a71cfeadd93c638f0babb3f02642d881a189b78c87a",
    "signature": "0x20ed8840a340dd162baf40d79102734fdb62a5842f997fce92a4c913488f6e8d7763c2b8729e058c072bfa5bdee85cc5d40ea8a40b1b08614314c475fcf7022f1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}