{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "981716494",
    "entityType": "User",
    "nonce": "0x2f203af8574544ac0754b630ed1936e865b8ab1b555b0c523a972fcdc9d765c2",
    "signature": "0x78befe317f2d0ef72f7abf08940c51cc7254ec3a48f56cc171ed6247f053bb853208730b4b08f90f128ff7da493dae32eaa13b33e9f1676f12c6fff76c1d1fad1b",
    "signer": "0x1F9dC682fadBAc94c0Dd4ca2232a3f490704a737",
    "userId": "737872723"
  }
}