{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343",
    "entityType": "User",
    "nonce": "0xcf68749f67f74adf59e9b3e732fa70139c0341b7368225634435d293a9d159a6",
    "signature": "0x7d711e832540775fdda868e7da1b049c37a8a2b72e55d475eaf50ef145a825df7a0aaff616f2bb708d33b485e573444cc35f1efc7f0f829f04ab01dd0af237da1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}