{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "42449",
    "entityType": "User",
    "nonce": "0xf1c20e975f76f88fdd6c9f1818fb2f5d4d6c6d2f0d89f9f2eeabefeb703a5018",
    "signature": "0xa54be7a71f46ea452cb345b38398c32f82faf1c5015f90549a6327fb86bc717915435c670f705c5ca1c8c17bcabc65cd295151cb353f16373557855ca4db15e21c",
    "signer": "0xA5594f75935B53086a8f3231b314C131605FEDA6",
    "userId": "140185425"
  }
}