{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0d43cd7414fddaba02762d064c5318d90326e3da217d3e886ddf2e361a7f6dfb",
    "signature": "0xa0f6fb57d2bf05b439a11bbafd0f3c7e6f2cd7eb663603b6dae7522a972ebcdf0075e0c41b38e90d397ddd6b8b25f9dea50baaf5b5e04ef0076ade824c8ab5e51b",
    "signer": "0x531fD734Bc4CA4FcCA203a3E7e2f564BE7861188",
    "userId": "720304072"
  }
}