{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "763601",
    "entityType": "User",
    "nonce": "0x268d38a7a1e62d3f35b662bc1acc883128ef475cdecd65f49e836b20a62eed5b",
    "signature": "0x795c7d984b8db95f7b57eb097370bd411ebc3ccad9742bb2f5aaf6a611b1873f46ec8b18bf4549c6fb3ae25f2ca18473fd4f5209c328d62fe69a79cb7e79b5f71c",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "301637"
  }
}