{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "663465431",
    "entityType": "User",
    "nonce": "0x5b8a6faa388223d86460f74ff2abe90d270a8541913e890bb32e32627434727f",
    "signature": "0xc0ee13d81a790cd5dd99e674d811641b66f6188498d6c23c56a29b32880cc0525a488099f1e94ac3a2a046422ce841848a17c8833b4931f028b118d60e6a5c0f1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}