{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x2e044e37f979664f0a4e34c688ee5e880650ba79d5f3d32fc74e69338537a1ba",
    "signature": "0x4b7d9361b71f2f5c6fbfd37520f49dccdbc1a6c53c481397907837733c862bb41b377b3cb2538fb5353a8d44b34fe4f8585b16e05e22b1be0838b978a865fa551c",
    "signer": "0xaddfe8a42a112B9e07190590DCa78C32CB396871",
    "userId": "380767039"
  }
}