{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "748827",
    "entityType": "User",
    "nonce": "0x0552ff3c7da8b5efb4f2cd0fb08c7a1feed7751820f599b88793e8080ee35281",
    "signature": "0x3193cd77ba247c125ae5345c05b042fc4cd0595effb2c2af76d0cab3340eb9da0fee879ed1f8831a2781a65be55a7bff1e5a59e61c0b3e9717f9adfa4401f6741b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}