{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x97e66082a7032752a84501c0c47d3e964331c11d410d32d89ed20de87985fcab",
    "signature": "0xdc33ecd09a406b231c22a2472da826bfb10c61b2bb2e08fdaa9ffcb8456fa9a9785c8ce1eea09ffec1427670d46c95bddf73515594201e0a6028375143a180b81b",
    "signer": "0x9837C03EAdfA74365Cdf4e01e6840D356104bFab",
    "userId": "911622928"
  }
}