{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990673",
    "entityType": "User",
    "nonce": "0x3960b5edb57e366061d6fac9bab67a9a157aa6dc6c9fe410a601cf297835e150",
    "signature": "0x8506c565239cf84ef01892a008b7dfcef0ca519c8d0f74a56f58865fa2e899271a982f26cdb173faa885ea6e2d1252cb5226cdf1fb218bc94f039cab81f05c101c",
    "signer": "0x12EaF77464824447aA995e75Dd707B3e5246be9C",
    "userId": "409175645"
  }
}