{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "781543844",
    "entityType": "User",
    "nonce": "0x45adc7e5df7859959902d65c64656f9910dc6fa84d6ecc2d46dd3ef173222f52",
    "signature": "0x03f030cfbb592cbc88eb6d8b397a570ad7460371eab14521190a4b453a68abc020f1fbb2eb564e141ec2e6c8045d72b7c452c778f9fea9d34e3b49f1db102eb71c",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}