{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "779540779",
    "entityType": "User",
    "nonce": "0x914665763f682630ecfa03d7ad693bf5e407767804663305c2993396738bf3f4",
    "signature": "0x073d30002ce42e23b42e22a0285ac82ead427261b0cd8daaec91bc6ef50fb101409f04cfaf2152edba6563f229e9ff4e971d4f6eaff8fea4d16389e9278439581c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}