{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "78123",
    "entityType": "User",
    "nonce": "0x502b40e6be6ea31c6bbb415c8ccbb2f2f7306a5be5c872e4cd16cba3c2b08f17",
    "signature": "0xda93c397aab2ff3b41073a23d79019ab3634ed10466ae83d3605fd5ef887e5613c0ccd693335b073b7e180f4b7bc4da1c7f94e9bd2771a8d71e4530afebbc97a1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}