{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304857543",
    "entityType": "User",
    "nonce": "0xf0b9053689c08d0ebcf965fa91ce789f75d487b415e5cc9576a217f5ea406c37",
    "signature": "0x46c343459c91659908c2bfae47cffc8397dd32e8390d2a45b82995a15e5c243a566f9e64dafa87f72f4fc62639d8ed79e97d8e99083a92e2138f13236d46c5191b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}