{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "759473",
    "entityType": "User",
    "nonce": "0xa1b976e1f34ff2387ccb5cc9f5a71b90f851cede9bae1a51032803a8baff3737",
    "signature": "0xc97f31e1aacf9fb82aee630ee5f029775a55e399b67b441ab3fbab97c8a4fd4435ab8d4fc6460deae48d6b5cb41f1a757052dbb122a466ae387d3b3cd37059981c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}