{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x39b156decfdd9fd38a678277ab46cf8c3ce57ad38ff5060b8c24a690256b3a8e",
    "signature": "0xf092cc40d65cd466fbc1ba9a14e9148fdca3f9fda783cfc30d6d707b06f7bb9b70f9699cebef6ff53745ea0db79e3ad44e4dbdce0af49c9d9e83832d5b8b8ec31c",
    "signer": "0x7E915FA0e857276481e34ca82B4A88B53a13ED15",
    "userId": "396044630"
  }
}