{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc39103bfc93cd4500a56641fa7c7e96a6023c50936f7159a89be636d1a2a8049",
    "signature": "0x609760c84c4c706fac702b180020a33675264a5847faa33782f59ca0b768f5e148a559b55bbdeb145cae46b7745c1b8258d039d1dcf5f7464e056765d7b428761b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}