{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "473966626",
    "entityType": "User",
    "nonce": "0x5b9a9c87112f048bf77b9c96a9d20a91866469e059da6d397cd857cf85ecec64",
    "signature": "0x4772800f531c053af90ff9a27e8aae1e48b20058d6345bbd0858a2259022239c53c43ba506f7fc14f5cea743399594e8fcb6b6105795e6aecd071f5dce4d534e1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}