{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "876578212",
    "entityType": "User",
    "nonce": "0x71548734cc4956c6cb5d996439095c88767c446cdf54af8cece8cea6e00a7633",
    "signature": "0x4ebdaf87a4b5a7f7fb2613acb4f3d4ecee177ceda79fe064e9a8cc5805f738e07a6b7f39bc14ae5b9a9310d4827b6ffbf4dd8eca0088a6ab59290b52dafeac7c1b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}