{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "298753539",
    "entityType": "User",
    "nonce": "0x96dd7f86d6c2e7551c79c430303fc068d09fbd04f4060c56406b139efda70673",
    "signature": "0x42e5972fd2a3ce6d65a7eaaad3ad4e991b27674cb59b844357d43d3c35e8c3e64604d0a8549de072a95fdaecea4e17f10702ab3efd8e1411d4579104764f62701c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}