{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648802251",
    "entityType": "User",
    "nonce": "0x70833137476628b792979b6584bb2abff87536e130c8f016b8bc4cad9be9b63b",
    "signature": "0xe83dbd602897f7cc831c9d3232e842c3ffba44cc6a088231e0514a4edc99681f133bcb98d966abb539d506c52b542de2b54b226858d72d9de33b792995cbcab01c",
    "signer": "0xfC070d9d02c152146e3D1B2cD4B03FD7a3CA1AB0",
    "userId": "539537193"
  }
}