{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990620",
    "entityType": "User",
    "nonce": "0x4ad371605bbca675f3f708c571c5ef47202a2f003dca416f53fae79101dd0efa",
    "signature": "0x44b9cdc773fe3e9ffc085857f11b3bd21f608b2b9698be0376af0c3649c1a2f767a8d97a8405fc2a2c3181f1fcdf41b187025b73f4bb9f012ec2e0c64ff5c6d01b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}