{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "685453",
    "entityType": "User",
    "nonce": "0xb5e0dbee47b8fbe8c2f5f8c55a6b154edfd5ab04802778475912ad397c304e81",
    "signature": "0xb3dcd6b07e9ae5ec4b1289b69598852912b10fd2b98f0ccc0584a26be5feb9696baca354c6e4ccb80b424026f1c4f93b0e6dfbcb09ebb1bc19f0da3278dfd0b41b",
    "signer": "0x7cb443E1D882339Ce2Db89944ef44929E8E2F578",
    "userId": "343301"
  }
}