{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x74097856483e3ebfd879643a55c98d88e8fc2f027d13af24249f968d86974f63",
    "signature": "0x8d94b03dd525a63c5dfdc7e9d9d9e15c07c6aaa9562c838fb1f96e5ec98aee4367d466eaf5272bdc5c83c690c79e5c59040019f862be78c7166891bfd2fa82b01c",
    "signer": "0x815E83fEAc4298D0D7207D23195351464b8C83b5",
    "userId": "819868507"
  }
}