{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc87a4a4ab1fc1aba76845f839fb57adfda878e7de2dea5ca7e1237aaa2ed1bdc",
    "signature": "0xb6f53edf7c7492497bf7fb014ac8e57640760d8f8dbfc4fdec485ed811e5ddaf5cd11220fea05d6c5a4c219cbfb1dbb06d05824aeac86d91b1c2187fcf4ef12c1b",
    "signer": "0x3efCd9190037D66be28b556a91aBE8B324B94CD3",
    "userId": "174356111"
  }
}