{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x31fe9139f0e36677576a1dcd7c483ce295e00b754c641f40364fa81cf1d1dfcf",
    "signature": "0x9fdf184d94428ac24f68097e34fa7b5122e5075e76c2db7108afef5bdfc751a249bcc20a2114263ded10bc5ff2ad139ae8120c6b5def10ba1896cfad29eb85011b",
    "signer": "0xa5Ca6c6a8CDe087d3F6DDc71f2745F9787FED97C",
    "userId": "819530730"
  }
}