{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "557210595",
    "entityType": "User",
    "nonce": "0x922e52e073d0760036781a9c912c78990736a084451ce72ec595288cd2ae940e",
    "signature": "0x564f9b37978635bf7d56ad81ce8bd118026ea7306a02fecdebe4ce6cdca894026f6d38b4091079412f05e7eebad0e5e42274d32eaf91ab2348e4a8b7dcc888021c",
    "signer": "0xCf3E6F9F4BF41C4e355E01484A92aaf61B6dd8a3",
    "userId": "149919577"
  }
}