{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0cf97a5866dd09c086d8e44e41323fb1fb0d699ef837e7de58ecdd9876e8c47e",
    "signature": "0x2d689ab917cea41d97d447f755c011fdb955f0287a19d83b82074d4ed1df00eb1998cc9d158037325f6c84217aa0d160db9f0b9dcc4c977f894c2dbdb0564e741c",
    "signer": "0x502e221791BBAb2Cb01c3ce8a22B9500AFd3E93F",
    "userId": "921884478"
  }
}