{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "5642",
    "entityType": "User",
    "nonce": "0x56dc2ec6993d748a0d1e0cc6fe5a20ea533b90b6696778ba5b2ff21d51ebb5a9",
    "signature": "0x98434e638712ba3a8af19b459e41bc3292880039116781b189283202fd92c8261054e3dd3eb048eaef0e84ab7e320f7f1f4ea1baf8f38f6beb75e3515cd93fc01b",
    "signer": "0x1874B7817bcc33522bD9D33b6cb197A1Ed939E51",
    "userId": "235421"
  }
}