{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "678556080",
    "entityType": "User",
    "nonce": "0x5bc13449ab088dec363002dc3ea5ac5c0e62996979389756cb45851c6f2b069f",
    "signature": "0xa32f1ce3b4b3ae12ea7cd747b15928d19416ded637409083fe70bb6f3f497ccd050e0cbd0963e63d8bdf4ee4f2162339a30d00a4ed2ee8f462e2246a5137fd241b",
    "signer": "0x9B305fd00d9a363195749eec4f162986083A6dC7",
    "userId": "648443373"
  }
}