{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7657322f4bd667bbc1a127e1155c978c79ec4e7ef8b5b26e7e66b8ea011e6695",
    "signature": "0x10457eb90fd4f3301a4c4456a9386010278d2ed699df5957c8c72139db5382226f629c69fbed245f3068dd9665a5c7dea4cd4d76b1a78a115feea419802d33211b",
    "signer": "0x7f7f6bdC1d2aaC9820bD5671Dc1F4A87cbd42138",
    "userId": "390757040"
  }
}