{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe4d5d2e758dc4d04b41dda59e5ad977df292fe1e5746ec83ab8ac93182e0ab17",
    "signature": "0x39c847d20fb82996f99ea5342715679c987e15310a4637dece06b370f95fa2f441ce9afc8a32353fe23e3cdeca34dbba5a159c97ce59895d0dca554ad3e8964d1b",
    "signer": "0x9976A5bDB93F69653188778fe013ed45ca0c2Ab1",
    "userId": "85051708"
  }
}