{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4a51404871b0b67835288ceeffca7f578d9cea6e206c5fc0a94cd4710875d904",
    "signature": "0xb5fa7c63247eb40b3a9a4069bb91892a4ceb2eaa2741316b4ba2017a256900a7413f20336ff8e3b7038f9a83461185d8060b00e6610e93c21dc134bfbb9e23b61c",
    "signer": "0x1A1e870176Bc1918E3015CdE0B874e2E25d9FD22",
    "userId": "80021193"
  }
}