{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "677883206",
    "entityType": "User",
    "nonce": "0xef7e0b2c0014a41658b68946d6d8774cb5006f0d7527cd79c7ea198372a9ea6f",
    "signature": "0x4302e7424d3866037e2fdb80df0ccfa4c1be78f60c778bea982403e94e4259e5514a63274e707a1ca4612220682a8cf44e031bc25760a9758f00a1c6a80eba351c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}