{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301637",
    "entityType": "User",
    "nonce": "0x42351a24e2b2c352e3889f1ac6d2bf70b0f43460ea888fd708790c7090944b81",
    "signature": "0xc487cd358dd52e1441677c2f70ddd1144901811cd1effcc57f27c2491e3854bc7da5bea9d1b87809eff67c965d66254d75a09799d468051d7fc1e561c0bca3a31c",
    "signer": "0x65284b16c6C99f85DECF97dEA10cB715d52BfdDc",
    "userId": "533692254"
  }
}