{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "515821762",
    "entityType": "User",
    "nonce": "0xb9f9821104c2db1228f6d6460b55994790e3a1e0a86c8b54c1baa250b6cc5cee",
    "signature": "0x4a68520921cbcaf7aa42fb318ed23ecd35c51743713e38578aeb0586b2bb3bb67ba68a0977be622e83c4308d15a13ea18e629a19c136a45e2d5e195f71d07a1e1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}