{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "773349352",
    "entityType": "User",
    "nonce": "0xfc4bbcf1692b2e2a3a50e9177524d9c455ea244f3200e7afc83e42a7456a110b",
    "signature": "0xe701d2d9fa2c4f01701e7fce9372c9d5aba8e2f15fe1092c2f37663aaaa528212b75eab11ffa96c7efdabfe01eeaf4283ae15acbc9f7e666cf7ecfdd2c1e96b01c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}