{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "661600790",
    "entityType": "User",
    "nonce": "0x4881e0aeac8001b2e61eea8c9c55a9a36cfe309b9a95b7cfa387dcdc44b9a191",
    "signature": "0x8c85c1b2863b5af9370f0c60a15937a54096dcc63d42ab6b35e438a42828f5b4705495feff659d36aa5999e68e014ce20b9b4b223d54129b29875e50e6eb50e71b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}