{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0xd9a54429c878baeea15772ab324c5fc52d3db3f023bd202271d9811c2f06e1ae",
    "signature": "0xa28a4f751b3c7ab2b0e5937d6bbc309e9bd603d05768f6724db457e307ee9d197a28634e1a429187fc1cc7bd1e44dff10f01a46f8ced5922e2320398420f7aec1c",
    "signer": "0x71114Ff581aA73d1F4b6429D7713914f10e8e90B",
    "userId": "894513731"
  }
}