{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "7504",
    "entityType": "User",
    "nonce": "0x408d771cdc3e8cadb8fd4854b586f02f6d7ddadded2be5d29aca9c41c7852c82",
    "signature": "0x58fc7943ff3d6c3c298c6696bf3269abcb3a4f961374a722020338ac67a4e048193832665b90c44047e5ecaa2e16f8f55c4eff592f9f8a262f2f62fd8fe95f051c",
    "signer": "0xb7C7a8D9d12EBd1Cd438cB065E97280E6D7e912A",
    "userId": "984691913"
  }
}