{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xb3e8cb489f8d2f622a826b8ceb405e0e8bc7f7d95dcc13b8af186ad39d7c84d5",
    "signature": "0x46de407ec0214236a9c09746db1d8b5f0afe3926f8f021456c7ea3f4c7ea2f2d22ec701cc01958a7dd3b46147ea610530929571fdcabecbaac316fbe508a8f141b",
    "signer": "0xaddfe8a42a112B9e07190590DCa78C32CB396871",
    "userId": "380767039"
  }
}