{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4220",
    "entityType": "User",
    "nonce": "0x65fb30b175cd8cac0c6992ed019e9fc7693d53b294c0685f2a9a4bcc740eeb7a",
    "signature": "0xce6bf7cce00b0c704e222cc6c635164522c48b23511f43f946e636d2bb03065167d453e93f2225536435a749cbe0f4b9f5723de9ca95b3a812d39e12394b006b1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}