{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123439",
    "entityType": "User",
    "nonce": "0xe8b17c724bda238c44057b1359348036e4ccbd4646df5f58ff004ef0409b81ce",
    "signature": "0x74a1238027e985cc0a30cebefe583d1b0f85cb02c4c4317996dbd9ec3c035db9477684af42c6a87a8fd548a079419a0974ca10c3ae8724d2dda1f226e0aded471c",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}