{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4499",
    "entityType": "User",
    "nonce": "0x5efe365c9ce966bc6f3bb174255c434925bd6afa3076ca6ec08560a297346347",
    "signature": "0xd0465428f01271547ad6667c7b79a10a214504c8f8d4972f78040c630a9a76fc2fb79c59b8aaf63ee731bbcfec4b357dc4760145beb50c4c38700e7326c80dcf1c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}