{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "688",
    "entityType": "User",
    "nonce": "0x9e68ddeda21ad7f7f905de858cfce7b64c6193557b7ef75a516c7f850d294cdc",
    "signature": "0x6965a6ee3c93b5abe06e366afaaf1997bc5c3e4b0cb05ff7736e9d89cc5690945bfa4764feeffb8508712c5c0b0ebc1217c287df33340b3cde0c62862b3eebc01c",
    "signer": "0x243f92B83d056f818b9b95664A8B7A86805A3E71",
    "userId": "111448"
  }
}