{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0xfa19301d3e0132fa62bafe38f196edb137c6c0e0c34e1dfaab54f9af085c0910",
    "signature": "0x66e5d5633e24376ae08a3fed4a0b468bb306e1418e458f518f5c82bffb80fbfd6f6c05576265cb2f3000e0b07738115fc9959ec24f5d34e12488bc9be8b1fb581c",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}