{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x02a33687f9d3f5e8e1e67e067b9ddc39e5cad04a4a57320407c97768ee128666",
    "signature": "0x420e752fbede7df5d266cdca9d9ca45fd775b119648e91fa2f13f534e4af6dba2c81ad975b1ad69d9b783ebcec5208dde1899a7f2c441ddd0714ad4852bfdc5c1b",
    "signer": "0xb5599Af31664c076A98Da649129e26cCB93D5Ab7",
    "userId": "648241147"
  }
}