{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "257465",
    "entityType": "User",
    "nonce": "0x749822a1b76c0cf671dcbf460b15648b9c386f29416132adff413aded6596c57",
    "signature": "0xd4a257da90723dcd5be3cdde68b54fc5de8f2e5afb83a9a78f8bf5eccb4f6af377db95623eaf3a56fd95363a51d8120885076db9bda974d83700fb42b331c0131b",
    "signer": "0x90d627796C9E2071AAd9F8C20f6dCE95587F6d13",
    "userId": "560619378"
  }
}