{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "621",
    "entityType": "User",
    "nonce": "0xdf7998f39c196254c2838511342da7cf1d30aedb9af3dde63b3c7f5919d82d7b",
    "signature": "0x86c186fa1a74dbd2d14bd5a114ac8a1b0942dabfd75ebe0580db8755254fd15547bd7c3f2ebbf9e30a3a4a1b8583c5e974f6c231899f52261eb6d7d9adb09c8a1b",
    "signer": "0xFEa2c41d314209186e519b7539c0FcBDa1F9f00C",
    "userId": "51657002"
  }
}