{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "666568813",
    "entityType": "User",
    "nonce": "0x4377f7966d24feceb207c32d2122c263ac6384a9528104bb5bb2f05d775de249",
    "signature": "0x25bef82550dfba6a2878ffa26c4bb11fb1b523b8bc7c164dd14f3a8718f6a40e291cdb60701b29200bbb647ef1ba8497caee24ed5f9b411897287365c7127e801b",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}