{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0xf4cd66dbaf6b67699432b928923a6efc07d2630e6335655ba238b4eafb8fa39f",
    "signature": "0xb590d6a81f30df359989c4a1671c73f45bf6a07864bea66e94bc899c8c5b68593f171df00d49116b88ac5d832cdde560fa1059600b48cbbedb6878a544e87b341b",
    "signer": "0xF46d404cEDc9A5cc77B9Bc3303877b1BC6CAF166",
    "userId": "347680049"
  }
}