{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "816709547",
    "entityType": "User",
    "nonce": "0x0936a238553969b3acbe332ec03895a6a12cb0daae2fe883df722abf4f77b5da",
    "signature": "0x3d23651a91064b90d1ac5be6a52d66659c78b941c5038b0dc486485fa577aff57d2284f985c2b4650de89fee86370520d6bc93d01aab936a1d17fe41c4a9b1be1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}