{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304857543",
    "entityType": "User",
    "nonce": "0xc5a7457b6ac666b9a0a2d595ef8eb7e02108376ea657ec713a0cdffeb68ad779",
    "signature": "0xd33d809dc01c7e06ff653273ebf52f6e2077b84c76e2750858578095441c95ec730df201d3fd8cf46309eb0f06cc47a85c73f635adeafdc04933d0ebb09665e21c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}