{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa67f660f2fbd083b993a143fb0370f909a0e90389174195494f0f68b4cf8caa8",
    "signature": "0x2806383e9080b56594eb9828a3faaf2a05a670c960cba304a1b17326179265f0401578530658344caddc4a70e6e5dca007becc5b48f639552a97b43ea66264c11c",
    "signer": "0xF707Ce56cfBBEd292263e81534ec0825e364a4Ee",
    "userId": "270321465"
  }
}