{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1575278",
    "entityType": "User",
    "nonce": "0xca96581e2a7b55bca89b705c570b42103515c58f4d2735eb9688496841c5927b",
    "signature": "0xff41648147cfa7373444187c986939750ba327013df5eab43b183748644498e54c281cdbc552e98b60e8f3eee808027579fb2e8d02323a18d2be4d440d4792601c",
    "signer": "0x884490CFa947bC5C5d41834F53666866b78D19d6",
    "userId": "475900419"
  }
}