{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8516ec5d05d256fa03393700cc637bfc4ad3aaf0e86c02900a1f59dcd3812253",
    "signature": "0x3ab02aaf73b6fd5cf073cb044dd78e54ed0639cdfa00ebfbcf24db4a8e285b0171e7f6ab088f8f1efd45c8760e972eeb23143e6dca91ba336b44807c67c392141b",
    "signer": "0xaa223Ad6AD72c8f702876eb61AdbaE4F1f36EBA1",
    "userId": "974403669"
  }
}