{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "390",
    "entityType": "User",
    "nonce": "0x9787d67705765026693e83607c6df135a8b45f018ff4308460c6fe0f1f78236b",
    "signature": "0x44e32745b7c200ade2545f9912d3a77d94d212a71acc45cdff23a6c7a89214760fc4c1861cff68ebf5e47544a96351b643d68c997da5a2ba97dae6057801339d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}