{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54432",
    "entityType": "User",
    "nonce": "0x7d58a06d322d976db142d85acacfadaa24e513680036d8916b968761ad33ac54",
    "signature": "0xb9f4feb35ba2a1138a215a40ac1723e6f7d388e3f19c58d3b191c988fc6c567e352bca550d1d18bf9b0bb244f64f0b55e87ff557d584f4bd0dfb95200edab4ff1b",
    "signer": "0xb8909c41963586dbBe3EbbAB4FC8F1f8E6970Ce2",
    "userId": "435332232"
  }
}