{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "661101608",
    "entityType": "User",
    "nonce": "0xc93102e4332c1fd48ab74ea8c4287c48b3f121e1fe43372de97b0e0546bfa69e",
    "signature": "0xf36781f4d4763a8ee817efbb9a9f11ffdd101ac97999d4c8460ade0635539d1969f610eeab0cf923b332359528d735a2f2b5676b7fde8502be2a525bd8231db51c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}