{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2154",
    "entityType": "User",
    "nonce": "0xe6f1d1500d528121641fac23e59897267ee2b73adc61c757c775a7ba1c7f8319",
    "signature": "0x51ddf50044109fa396f2485c21ad47a80ff58177b3e22a43fc86dafa41362854433a52afd83ca254c5e778cc26fc50291370aa2a7705e2dded7468c4a019fa4f1c",
    "signer": "0xFEa2c41d314209186e519b7539c0FcBDa1F9f00C",
    "userId": "51657002"
  }
}