{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x57f89167803e98cd0119f592d303b564727d3eb9c1d398ca15f6d239e03fa497",
    "signature": "0xf653ee4c69976bf261a7baf26e360713151a9281e139614f374e7cfcd11328f504c1fbf238635d1d0d9e4b1956d78cbb1d055fd5a02cbef71b7fe8e2801029c41b",
    "signer": "0x877D195E0F5Df3506016fBb0fb1b1E26e65B203D",
    "userId": "508153670"
  }
}