{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "375544",
    "entityType": "User",
    "nonce": "0x223f4f486b770c32ea92cba619a80a8a849420e7f8dba088ed2ef7a0c9f7bb68",
    "signature": "0x6213252ee0d47f123f89c74edd7d1682fd1025342fa8183c91df0f7d42d2c7b82a3e38b2ca51ea527be6fc705f895df7603e8302e696631e25fc67fbc4d94abd1b",
    "signer": "0x87FC3581f96D45b347BB39E15f25079950C5Cc27",
    "userId": "339826419"
  }
}