{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "816709547",
    "entityType": "User",
    "nonce": "0x40603982c054bf274a004459d3d83efa452896c1a36fd80dcf244e3af886738b",
    "signature": "0xe0cfded8086b231c6fee6bf5d13629d7bf8a9db884823d2a305e286a1aa480241f42ecd6c7a4e74d6991ce0bf0a2d6a078f0b108d23476322f0692b1702d35211c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}