{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "454340338",
    "entityType": "User",
    "nonce": "0x67549297cbf652b790d10691e279c80afc3939e6c5ee3fb5debe0e55f867b324",
    "signature": "0x08190f42e5594852f2713cc66e11107cc5b603e7d4b18a421fd9fd9efbc77c8b1b5287b8c5fb7676b2eef12b34297bd8ed13bd0a0f93261c879827a9680d2b511c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}