{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "857164147",
    "entityType": "User",
    "nonce": "0x3da631dcc34deab6722af598720696c2ebe97dbef726f9d87805680135ba65de",
    "signature": "0x4e6477d6736a8cb0b549ef6b0933174c89df6718874a9b81532c9e9a5fae50cd3f33889627f035676818ec152d4b015aed013d79aefd89ae9aaa1b6c2bb870b01c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}