{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x78b6c311e6041d3a202d9fc5ead3837dd31e4aebc275173b495dedf22e9809e8",
    "signature": "0xe5b3cbcc224a62792f231c624332dae764c3b763c60cddf04efca1635dda696659fb8a74d33b234cafa942cc5bfbe170d50b2718e8b3f5c9241618b9d68998a01b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}