{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1c3a23e9d581936f075f9b89d21e282d1db429bb6bba81d438a1fdb7ecbc2795",
    "signature": "0x53687ee881318b92fb308db479fceb9d179e6056b5ea0f2db21b7606af00eb9e4a82ccf2f0380febe1121d27d0eaad530424d18a8039c9992a2ed6e98d8edfd31b",
    "signer": "0xB3bA3F88Cb7244F18E924c2C2E6c2F4cB1F38888",
    "userId": "999867460"
  }
}