{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "681866568",
    "entityType": "User",
    "nonce": "0x98a1d417a4b241d8cd358b1d9d90a17a50a0aad618019fed7a8f5bfa2c715c4b",
    "signature": "0x1e99050d7b489be72678b53a4d688c40816ea5a1b297ede7a83b653817b2d97e690739723c1f5af6f830814938baeffe3bea3e2034137bf5aff9654c117d2b611c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}