{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307482",
    "entityType": "User",
    "nonce": "0xd8ac19a08acf91d7887a017ba6f05d042af8cd3330f70d91f449ab49deb8a27d",
    "signature": "0x8d22e561681ab53dc5454e3b108bc9dec59509e6ed32c8ecd4ce6d98c4d5ce8245f4f0c2c5ac8be821b184b3248ed7c254d0ada58ff18cb1f289f58949cd1e631b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}