{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "339449",
    "entityType": "User",
    "nonce": "0xb81503cfc81769a98f8de39aba987aea9f2ae335416ec77d3b96225a1740c409",
    "signature": "0xbcf4d318def7881299c0b48e5b440a21d75ce5acdb97e547719c34e9d90f3dae3de541e19438f5b0a593ff96a3459fc5864d4ceaad21881b0666f3ca2ddc6f7b1b",
    "signer": "0xdcAEaeb1b2DF396B02cDe67B3D030cDf38261A5B",
    "userId": "58531"
  }
}