{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "999548897",
    "entityType": "User",
    "nonce": "0xe4c83472801b54540f74e36102e41304c3bd69c7328e528471849f2bada4328b",
    "signature": "0xb5d6486f0928f432a147a80f01a8613ecd43041d65a17a1930861381c2e9cae3309074d9a214eb12899f1a7cc8a6b4d9a0f6f4e75c57d00a282948265ed345c11b",
    "signer": "0x0C73Cb0314281db439083e5ae4b1443Ac537a76b",
    "userId": "346579799"
  }
}