{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648802251",
    "entityType": "User",
    "nonce": "0x3d36df9fa7fd304d6d63cd270e131fd7c8d603d1edfc0f5ecaa8300075ed30d1",
    "signature": "0x437d9432724f98560b7f06ae6765ed5fc2e6e323989b61f05d070ee3ad0e45cb2466538e9b3e3743aa03b5d7dbcd9d966256c51927e53d76b7427fab64ad06af1b",
    "signer": "0x262FfE6368E86674bFd32404757f3A8B1a189F85",
    "userId": "664900058"
  }
}