{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508186998",
    "entityType": "User",
    "nonce": "0xf6fbe701bff59d5779070ad17673feb68446b750e771b7b0d1a764bd7c40e423",
    "signature": "0x891c3d8d544cc1608ff699ddcb597befc75c3b3490c12154d8f350d92b72a69d0377c5215a85b8b3d02a5680c34490604c1eea1d50fec4d64c964afba36c9a7c1b",
    "signer": "0xfeBBAF2B7d9F5bE3DAA34bEe70259f61ac4aB836",
    "userId": "139146722"
  }
}