{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "5304",
    "entityType": "User",
    "nonce": "0xd64dfdf33a78d0f427dbf8e20bbf566c00ae8aac6830a4686bd7aebf2028f8b5",
    "signature": "0xff4475f6b98f5eaf571afa5f7141add8e681e3fc807eea01e917eee03642b0d2322b3bba04a2c6a19393aebd05984e760eb07ca2b38f77e61f62cb367711265a1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}