{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "816709547",
    "entityType": "User",
    "nonce": "0xaae988961e02a6a40b53fe6d42f25a4b1fcef35764e63d716b82f3e32d92578a",
    "signature": "0xf091ed4d86cf762a5881fdaa6548fde52474602f6aebc454b7dc58a5ee9bcd6f75c1505138e2a5ec697315ea34e9dc33bea3694ad9c3312df7dabb264ccb433a1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}