{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xf835b60ccfebe7e2243d5c4e3f1bb9186c3a15ae170357e16dcc184b3f7754f3",
    "signature": "0xf5d90410a38ddf4aaed9f1ed1cd0e5434d7be70107b4f470184abb578ff6d3830f03b3b0bbbcb3e448ff28263ab0de5a0cf8bc0fe007f3aa8dc9cb12359aec401b",
    "signer": "0x355325e20819Ca56f2C729fEb6E34FA039625A24",
    "userId": "39191"
  }
}