{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "663302",
    "entityType": "User",
    "nonce": "0x04afbd899aa6a699dcba687efbc03df55eb8ca8863d9a72f377beadcb23c8f51",
    "signature": "0xa402502581607ba90a23f0cfa004ab2354c31515c4e7a5a7127ef3f8dcf5aedf06ce4420cb4d4be98f6e328b34a54200fd80439898f3b82eb4960291154e86851b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}