{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "487285804",
    "entityType": "User",
    "nonce": "0xf6191c974ea604c116b3978477d4e661c3203480b356114ca57b9c7cf2f9538b",
    "signature": "0xe0e60b91d5720a8fc3f61ce4727bb0e169a316e85f7db7017b84ac2c5e9f66d81c3f81d8b1c087a7e2b953522bfc915239c211c5b3cfd500b59681a7a9955c0a1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}