{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "154520",
    "entityType": "User",
    "nonce": "0xb75687b7726ee65da4eaca782493d1bc6c831a94b790fce111236a34b69cf53b",
    "signature": "0x17a3de208801c5a982a99a21d78eba3ec4b318ea306ff4903fcf5de15a74c494663477bd377c44002a1e1e122007b71c39f5001b73e5288eca4f60ee4cf4fba61b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}