{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990836999",
    "entityType": "User",
    "nonce": "0x23dd3ada8dd30b6ac8a185d47bdb5874894d631bae5c5530b90bfb9ae0ad16b2",
    "signature": "0x50670aceef5929a806e67c64746a62af942323ab9701125dbf79bb374aca612012dd323362de54945e95bf548cb18d0bc2243ebd3fe9c78433c57e21cbc5fb7e1c",
    "signer": "0x03b70C3825d7b9e568C53C89a738061d855d0dec",
    "userId": "578849678"
  }
}