{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "964899801",
    "entityType": "User",
    "nonce": "0x966f43a6fb1a4e89bd8a67ad2bc8f481219bd3e443c8c2ed93fbe71da7f9afd5",
    "signature": "0x0515556ac608ff8e5c1149045d72a46e8c800cef865a3f93892a1d056ede2176344868df515a0d5b5a03265e608ab1a07b7eef1477442821726b998d9c0296351c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}