{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x75b6298305881826dd390b332633472e7498efe894498537fa8abea36d326eda",
    "signature": "0x67e3972d1904adce7f4d5f4e7ccb56e3ef95e5c53a0587ccb972c820149daaff5139390ba0b04c1ef4dda360f4389470d5b7b24a304140382ad2f03de36252781b",
    "signer": "0x6488329FAf4894A2c9Ea42793DC0b5eBC5F71C88",
    "userId": "789747241"
  }
}