{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x123c3dc2c2d6c065a18e420aa79d89d06d6a7aad4da821c8f837c74492df5a1f",
    "signature": "0xd83e8cad0001a3ce79ff8d42bf589286d2dc0f0560b3349eb3e5bf8f56a9e4af2513696dfd61de1f2582e16d9f87bc1f17058b1c772d54154dc97f75e3abac2f1b",
    "signer": "0xa1F606584fdE30bB7d4BE2EbeC98A5F95E4559f4",
    "userId": "786922215"
  }
}