{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1345",
    "entityType": "User",
    "nonce": "0xe2fb911082aff28bca55233a5f3621626407295e51ef4787046f9ec4ae2a7e6a",
    "signature": "0xd0ecaacff2c92a0d1c51622d19ac3db21d4927c365f49948663283cc6eafdeba527e493b3c65d1fa00b4ddfa52d2f59eac4cfe125964f1691919c9f24732ccf31b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}