{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "520530",
    "entityType": "User",
    "nonce": "0xccb649779364b31b0bc67ce9294ddfe72033bf3bd471f7d4a4a4a74b1bafb19f",
    "signature": "0x006f0562fea4138ff147c07dcbf7b87f3a66ee4f70ca0b259d019ac105a065c973b8f23bd460403b2fd4a1b7bb25ee4dacf45c0b79f16c34d00bb77d7110334b1c",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}