{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0x7c6b345e79a88a25f2936fd5e2f7ddeca4964455f75d58ef07b390e3e3329d95",
    "signature": "0xb473f1fa161f403105c7eaa537da9f4702176d1e4f3d46733f3bd6033c00bd3364a87cacc72decb48f751bcf68f4fb13b7acd04ef9b20bbc645176b1610c9a571c",
    "signer": "0x64F598C81c0625EA190d421bEe9C604A9EaD5ea6",
    "userId": "462839245"
  }
}