{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121215",
    "entityType": "User",
    "nonce": "0x0f779dcdef4097c58ae52266dfca0436935d8a59811d6df0fa61b80e4ef9dd7e",
    "signature": "0xdbb54635ec0890bffd6ead565388d2d24aca07bfb363d892bb71ba0bb4bb19d60a0cd511baa9f4e7645b92f67a0051a61c058fa6b63f4caab17da14b4247bf541c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}