{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x04f5a9a8c7bda2a990ab6620f2580776ec3abfcbe05f509e8cf0c470138be451",
    "signature": "0xe12a61759186c22c25f148ef50a3035aa27ac9daa07500db501fbf5eca7b11da78852fe383d781791b6ea6ab7fb162e5fa872d639f94dd4923771da5d712193e1c",
    "signer": "0x069B8AfA1738ee411F7138e49d8baA21774732C8",
    "userId": "403438532"
  }
}