{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x07add4a3d691c6e9cdff7c5ad75bff2326fe1d03986c498622f4454624c47a45",
    "signature": "0x9972b5be3519189bf50f1df2a7aed2bd3d2470dd859d5c00b86673bf79e8bb37776ebd2a5f94a91d71e6b1e581b1f9045c4cdd3c4a79d5eb9c73475f775ef8bf1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}