{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "643532828",
    "entityType": "User",
    "nonce": "0xb5e886aaba0c29ee292367eee614753a66b7a6f9567cd607798b750f34ade3e3",
    "signature": "0x55d3616527f2560fa762a92ef45b34ec34f69b794cbf84eb234a63fd08e1ed742d395133530e071d2e65e9ecfd173cfad3a5e5716ed477e3069f7606501f49d21c",
    "signer": "0xeD4de8C7aEdcca7a62a5E17Fb9DF5ee4991E5b73",
    "userId": "209405413"
  }
}