{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x4cc557c56a2951aa4733fcb8d19ada16276d3ed1cb0c3c66064dce511e24dee3",
    "signature": "0x4f942347238f99fc662f16795e2b9e7ac9a322d646ce4e26a7026e2460f08b04089418348e673165a370025fcd722ee5e701b43a7401f0bfabbeec49bbf643a71c",
    "signer": "0x168ff3b3F21912D4d676468A80Ee2af0E2F24a59",
    "userId": "124431641"
  }
}