{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "8449787",
    "entityType": "User",
    "nonce": "0x21e71ecb015a7fe2461ed1f035067ff5a474c53194145558373711ae6f2c935e",
    "signature": "0x5378c04f22f33f625861d820e8f58c1f05310f6876ebc1f7fb9b5e7e8b7de2067163e5e3b2b36f03793cd80c080c78316e974b6bf5a2f006ba50edb381e0ae921b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}