{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "900087973",
    "entityType": "User",
    "nonce": "0x19e3dcb8df13d2436a2438200791b69f069b3d3af30de5552318e077e92ad989",
    "signature": "0x2bec4b83931a90a1846939c5903c1eae2cb6cb8a393adcbbbbfc4cb61d1159916a81c88839b75ba78711f948f140cb2040ba47360b298347546940dfdfafd5871b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}