{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "748896412",
    "entityType": "User",
    "nonce": "0xf44de19bacd3946e191fa166f9c31376f5d4349c8e88fd84a6555efbc9c22910",
    "signature": "0x73139ea210ad855116c3cfe0e292909a4133692c0f220b0cc905a2c4f3b5c7c15f8aba9be4ee06b7abe347725cd78f286a6c86db610b70359578dacf5d1b23d91b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}