{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "981716494",
    "entityType": "User",
    "nonce": "0xb1996ec27e288cc5ad5bc880b5f16ac64671c406f48c153e1c5dd851e6488edd",
    "signature": "0x557ce80dc8b88b4557153e11e04edb60e154debebd064043af565be4f395b7955eb298d94d0f77e43510caa131876b8e2b23432645def33a57d8808bce128a861c",
    "signer": "0x854726bE5910ceEe19fBd2D4CE0518966CA41382",
    "userId": "124312"
  }
}