{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512888028",
    "entityType": "User",
    "nonce": "0x5971352dd524db054d35975b084cfc7ea0dc81417d9cf3c7140fdb22f1d59b53",
    "signature": "0x1f10e0fcf41a8785fb8299291723bcd5bd66988c4eab86f5bd99340af238845a2f6e4a211b208826275296e88204c96039c8d2f34d2419e55168922ca4cefec61c",
    "signer": "0x1E0619427fbAA6B83C375aa4DFECb642e7E337eb",
    "userId": "137931068"
  }
}