{
  "manageEntity": {
    "action": "Save",
    "entityId": "2126017937",
    "entityType": "Track",
    "nonce": "0x309863ef84befc4d9ea1614668d29ff319c9dc5f9a3ef3237c875bd2be9e822f",
    "signature": "0xd9ad06182d68e3f584a4aa2b2e5fc7bf2d2225ba9811cb564b3fb46e76d3922f0809cc05f3e28d18bd731bc8fd60b3e0ca0b81a5c0ed1b788bc29f387ba863641c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}