{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "9000",
    "entityType": "User",
    "nonce": "0x30ebd66d10f594069e11c162e96374564bc1a9ea0be35d485a1a3235f167a7fb",
    "signature": "0x845ef5d3a6c16f98f91b65ef377374fa20c3f5fcada54b9126282dd47c9d79d673a13cbd147c90c0f3910bc070f365ccd13143aeab0955e6db052ec809067a6d1c",
    "signer": "0xEc483842272Dea925128F7ea8Bb85F671f49bBAB",
    "userId": "212561617"
  }
}