{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508076300",
    "entityType": "User",
    "nonce": "0x4b820adea5490e55d89d5e2eae3580c7d6556bd1e834df9b5540f5a5b4b3af93",
    "signature": "0xf9bf495254049a203edf551d96e2673b8c456ee7ace7a97cba3e6dacaf812bee4e63cd82e0aab3b38ff677b609d63b52fd832499a64e264cfe149855b395b62f1b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}