{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18278",
    "entityType": "User",
    "nonce": "0xd920ce4784dfd4f03fac40eb2bbfd925105637d40538a6c0d383292cf042fa6e",
    "signature": "0xfdccc972f31e56b8705d5383754a1ce5249bd6a594255c4e0e84fc30c00f46286289dd10bb3bad41f9d938d6203eeec75f437cc146bd4b8e319b5865942df6a11c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}