{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "56990",
    "entityType": "User",
    "nonce": "0xa28d81cff5227e9f9e78403eddeb0c679d4d5802beb938c91026f0b22e568b24",
    "signature": "0xbfcd5ffab16ad4b37f3d8ee2c6aa5a435b821d5f3e8a05b5d47e0d8769bc9d1f1aa65656782771b9d19878594e2ba49e5ab5bcc2c9605aa398853de293cce4cb1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}