{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x6280748a886f69deb8cc38f6a5a88e76847c9c31e7a129cc0967db2ab081846b",
    "signature": "0x1a31c431bfc4e6d71b3f9837f448a2f6a063a3ab0893b2973d672884809b1fe30f83360f868dce4231ba8c74338d622b4cc1f7a3762596619d2fcc25b49fb1fb1c",
    "signer": "0x7a78569646ADa00a4d555F20fA48e9cDb9ef14F5",
    "userId": "333304008"
  }
}