{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "187397058",
    "entityType": "User",
    "nonce": "0x324dd9d351d0d71add5b333ed494d12e7753fb2c0053f51ffef47aa0434aa1d4",
    "signature": "0x8c705c47eaf6e45b2981276d1581a2879c3322896251363bc4d97d559327fdea212e5b8e60fd8e50e98f26ed4c51df00a884b4c61c9220282d9e50b1c9642ca01b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}