{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xec123f3aff0f15fb25e5ba6a0b7c61405ae5fc13c4c7b57fdfc6fc1cf247d816",
    "signature": "0x5740560cc3b4e5bada3d8ac7cfbf99e6f4a950f06dfa127cdd9b9fdf7b7b21881459a6d3d9d2a29ed407534c53a79c1df54b693c0776542aeabb2dd2b4ea747a1b",
    "signer": "0xaC0d0e0F39E32baE28394E2d39Dd82Cbc14Fc0FD",
    "userId": "719059057"
  }
}