{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "661777867",
    "entityType": "User",
    "nonce": "0x9b92b2ae7854aa2a31f36101ee2ce61bfe0b228a89bcba1615eb0e4a260adf0f",
    "signature": "0xf73d252214767802f215c8d7c10914eb85839d6531adf5ac42b7cf60908ebf3629067b8891612db0aec223156cbb23dd82d540388c9010867b36a48b99c72b261b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}