{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6aaeca38d40bf38aace0d55abf46c88bb1cd765177036de553a4f7d698e230a5",
    "signature": "0x7a7b96a6c612068e96dcf5aab5b956f95918f732d53581e89136525251e6b7de60752a1914825efce83964fa61b869ccb34930a7fa902c20587e50d7c530f0541b",
    "signer": "0x51F0B9CbfA02b6CA88Eb180845C7F8C1B74ACE39",
    "userId": "319049298"
  }
}