{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x60151d863d44a5878ea49c6e6861c2da6f4e2cc1862a3f3e293e8e7acb19f033",
    "signature": "0x9333ebf888bb9fea3dd6cfee9501cb237188a7141fd01f405f1f843e8e03d99438ca2e4c14e3980ee5b12f9fba41dd3675bdd76aac9a4fd709a1197c5d8339b71c",
    "signer": "0x6Bd4FFED99DD049Cd6c4d3DEbA9CF0EC730Da373",
    "userId": "453194591"
  }
}