{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x914634bc2fa80ceebfc46d47b3723ce509344a2abe90c5cf2f1c888fef17db67",
    "signature": "0x99950cba6372fd922ced697d713ba3f18bb707316eb7e4ac0a07ba0e1d64d2740342264a6f031f4fae4f9739f8879e8bb56125b7d88bcf1cba2190acd12104741b",
    "signer": "0x7CB6Cff4eBBF3a50360Db8fFAa2E97Bce567E850",
    "userId": "419478668"
  }
}