{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb4709d4e98efa207783b76e7a0dad1133b5bc819407a31dc298d37895277c364",
    "signature": "0x675d8138c14308f505d49b4d298c9eaf7d9c6424a64b94c24cb008202bd7a7b5095aec25d390e5bed18787c626ee5bf0ab3997c31fed3ebf349e02230c5e2da81b",
    "signer": "0xa9f9400e53E0081283EDfC6a5d4BAbA3a79a610F",
    "userId": "138313310"
  }
}