{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3148ede91e08e04d6b06b603dbb1ff533ccc0e5cc60d95a0155c256cc6c09f95",
    "signature": "0x120126b6679b5c59ed7d865cc97b189cdb6e5d17a3f77e883a17b5c85afa30385e6b5ce092d73a9efe004e01bea06ed1c3850728c805291462664a8819c63d8b1b",
    "signer": "0x64FDf12811310B6772ec5873EC74501d9Fd3d247",
    "userId": "295777906"
  }
}