{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "340690975",
    "entityType": "User",
    "nonce": "0xc59adfc979f24aec59557f0c1f2213789f750c79e0d639be1db67e4ccd4c92da",
    "signature": "0x5ef843bc83dc5b6390d1e1a6062d652ad5b0b91287c38abbbfd76707a16e10845bcefaa8100a617f41002873119fbe615ffdd9ce3cdb2d007e4633b145f82a7b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}