{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512354652",
    "entityType": "User",
    "nonce": "0x5f48c23385735a5aacedfe45ef94e81014add74721dfaa4a7861a771e6ce60d9",
    "signature": "0xd85604d68bb08a9e739d39c75f31c67e7e4c9c966981856cc897301eaa5c8dba5be0a89e3158b89a404b501503b20f8f18b2c5956700be584c9338dad3bd7bca1c",
    "signer": "0x8d9D00A94c3B1C9992e3CA4386AbBC6345B2E876",
    "userId": "396658415"
  }
}