{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0xdb3058636ae9d1a14fe014eb298cecfec8b32f64dd33a5a114bdcbc314d7a933",
    "signature": "0xd6e9f3bd286c9292633cdba5a3a725123b91dd609c6874cdcf61ad1b53a7665f3c31c5bdd492f37e75ff3c63efe1318ebbd300454b60f7b9270cfcff9c34bcef1c",
    "signer": "0xDF9352d1988F7140ad4167745251E23Fdb425be4",
    "userId": "323789212"
  }
}