{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "42400",
    "entityType": "User",
    "nonce": "0xce68ef527f61f48e8426935a509e4b4ad18cfc418f994f52319a74ce43e43d73",
    "signature": "0x4761b3fbd8e8e9debc618c0243782f4be6af3ff1632f2cd5266a4b02a3bfbac218770483f5021e2773034a82fcace81d940a72e2418abd4a9780486f7eb1ca481b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}