{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x21dd4d05c8aa72e442e57cf94dcf2427d9bd9b6daa3b8e31efca8f12c57b99b6",
    "signature": "0x258327c272c9095797dc837811fbc392c86a160d4a444125a0d1b12823026f187470ba0dbb5e11d707ee97023487efe1e848c65720cf7d01ed9bee7214a1f3181b",
    "signer": "0x169c0EbB5B86b5bf9bB46627096e1864dBE06085",
    "userId": "19423820"
  }
}