{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50737590",
    "entityType": "User",
    "nonce": "0x53df9a619f0c163372af74e7606c6b196adfda86e39d33c33d8d85566188d898",
    "signature": "0x7ef0af7f9426c5c8939902457eff37c398fa41c754b028ed0e9af3b022b2186d274e8ce089bbd10b65c4252eeefac66051c455f9f3c22a511b00aa6759c22d7d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}