{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4189",
    "entityType": "User",
    "nonce": "0x35ade0e68d6934b54eeedc79d06179acf1aea0694df7814e9de14d8cdd656b02",
    "signature": "0xd1de6d3e6511688db19ced64a70bdc3b37993e6a866c3908f47a76fdd7e2747147d26603c87907e0966468975120eedf97c2349b626489ff411b8be121168d701c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}