{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x38b3c4642cc38a3bed98b8bb389a3d5a17b797eae9d60294fe94a4f4c98f93db",
    "signature": "0x7cdb1b498ac7e8472fddecc717179b99c3eac82d5b04a85e558cee17b4648b063facb2fa7fc6ae192a99b330febc167e92d5d167459f9755b9aa9d6af678e2f41b",
    "signer": "0x257c9f4A9563d6A4a2bF3be7Da1738e167fcF295",
    "userId": "301719964"
  }
}