{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50198",
    "entityType": "User",
    "nonce": "0x7557217fd4c9e94de04359f9078602b9917fb6c4dc29b4264457086d87902217",
    "signature": "0x224e0b26c1890dec249a593d9182781dca41196e43a90cc1413ab527734c4977089d57bfe469214074ebab0b21889e4df2b87cdbd345ffe874c4137f8ff6508a1c",
    "signer": "0xC90e14007305577f04e5F4f5542B2191bB2c7394",
    "userId": "1856608"
  }
}