{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "745972464",
    "entityType": "User",
    "nonce": "0xe4b93b3e5b472995c4d238bb42e51c777aa31aefff7e48a757d5aa0894dd1784",
    "signature": "0x568c7bab55814ca9b72e6ab88a8386a6f30a11fcb91197611f1f6820f93358b04cdb6b4cbbc28829291cc2e10aea9400729a4a033aa40f628c8797a07085cc1e1c",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}