{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4510",
    "entityType": "User",
    "nonce": "0x294528e7d5c86d9baac2b529ad3580c33fcd961165312bfda977c1515b74e4df",
    "signature": "0x00c48b2e392efa2c31c41e2e4a72cd741cda97492f349d354ed0e1e20747dd011fee35d7349187867c1e1001a5c516c3cb2566111dfa3dc4ec2ed58195095e941c",
    "signer": "0x6818B889bFEAe14D2ADdaC4dBF0eAe75779d7Ac4",
    "userId": "341292657"
  }
}