{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xca966fd92adca7a51bbca480b8f71275d557cff00b7acaa8a9edef02440c0b78",
    "signature": "0x4a44ac98a1141e5fcefa1b47312cd7fbf06c96826ac5f4bb87df73a0b8b97efb4e77c51854906238caeb1b3fed1a85d4aee947d9addf2d1b8fa563f7859551eb1c",
    "signer": "0x821EeEfD9b00D59b05756c9861bc5B48b649f4ED",
    "userId": "490473214"
  }
}