{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "339501",
    "entityType": "User",
    "nonce": "0x2307cd1117ad4501780a7cb2304a332bb02ec10864a99b52b5b5e9810c5dc89f",
    "signature": "0x523841b7b3fcef9670888bb5e6021ecbe1631b1f4e2783bf00594c2a67cc878449d05950d901e85c7f4e88da99ce0df97c8a606ec74c7c1b89a2a75d8a0b2c221c",
    "signer": "0x9c1a2996a6DCe12e947BD7C8A755b6150A3eD5f4",
    "userId": "474113241"
  }
}