{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "257534016",
    "entityType": "User",
    "nonce": "0x478813b5f9858fc6d5f504b5682a097af4cd66f94f18908c8927638b9a0ee8db",
    "signature": "0x4f8b08cc2d6d4d0e7427bfd96cca7688881c28546f67f7266c2b894c0b38e0bb2950436441661f5633a0728fecd7dd7bff7e882a07ea584dde5815dd81943f511b",
    "signer": "0x03b70C3825d7b9e568C53C89a738061d855d0dec",
    "userId": "578849678"
  }
}