{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x933d5511607c491b0c6fa6a82b926de17dc3ecdff07486925d7e56ce60e74dff",
    "signature": "0x515d86775368eda8ea7652e2e60d9e1a36af818d81468702077e6c0a08334a7a1f80c5a3a6275b160b490cc4e3a52dea2983cfe0d656dac1cf5f0d1f439297991c",
    "signer": "0x1b9Ea5D1276FB8020D64F5B4E19C4A795f2698D3",
    "userId": "306087079"
  }
}