{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5a97aebdef5a543efcfd7eaf450aa38872661685a731b02f9bd467ceb352a0ec",
    "signature": "0xa1ea61efb0622fde9caa35bb58f13d4f9ee7dbe0d7e2fadf906619faa6f2b34a7af7a159e1636744dfa7a463d3d68fad6409bac10d0e444e377ce492c903219e1b",
    "signer": "0x7c73CD99a6B25A6DE60A0D8191D1c71f1380eC8E",
    "userId": "621382778"
  }
}