{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1ec657b616afba6ec814477f701884ca6aff4c7ba61488eb5e38217eaa847531",
    "signature": "0x78a41ac2723796ffec5ed3846cb8fc6c555736118219a18a990d0f1cba3709b87e1fb9714c74eabfcf4d77965224abf9e21a826b4d07e41321bb33bd4b9f615a1c",
    "signer": "0xEA204F8a0fcB8a990f24A4E79156a5Ce1dD9afe5",
    "userId": "387908512"
  }
}