{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x46d5536b504671b70140fdb7de73a8d8844ddd7085cabf73258456f520fcd4fa",
    "signature": "0xba8f2616eea45d856d1232019bc8cabb89cca0d51b13fed7947a808dee64af0549df86890b22d81ae01dd5d7502130f4cfbe105cf4f60656050d1cc9ad2b2eff1c",
    "signer": "0xE48F4BDA8DBDE8b4300791d6D868309031E73DE2",
    "userId": "300460029"
  }
}