{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "642625880",
    "entityType": "User",
    "nonce": "0x00b24cfaa042befcc815c4259772db4149870f253ee39fd48ac5376574a9bf3a",
    "signature": "0xdfcdd08deb3852256d31cb193edd350161cbad0fdf96ca4f73460443d026331209fd87425ed63b13634aab687f5a8ce6c16949067a3d7cda20cde074a8929eea1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}