{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "339449",
    "entityType": "User",
    "nonce": "0x3457517aa0d0a6354380e8993b59a407d5685101b674e6088fb1f269702ee89f",
    "signature": "0x470a2a2bc3bfcf1f5f0037f1486091431d1f680766a2b9f7f18b5f7b6398ac1940a4c3801e391ff2b84402951a4627a93bfe4a6768424e601ba57703a47183021c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}