{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "155973826",
    "entityType": "User",
    "nonce": "0x3e408a570d87faba3a2ebe374aeb287bd54cda32de9f48c03998ba6ecd5eac98",
    "signature": "0x7d9044b0dae814e25b3649841447a0f7c8fb46f6a357d63b73960daf1ed8e715550d3455a465cdcebadf94074e1d8c16163c23a74a69ca830cf105a0f7fb22b61c",
    "signer": "0x5D4848bCf5c4abA1a0Fdf2B61408c9e4288aDb0E",
    "userId": "305415280"
  }
}