{
  "manageEntity": {
    "action": "Save",
    "entityId": "1629752403",
    "entityType": "Track",
    "nonce": "0xa10661e5074b38f80d7838e1a8eee222b15079408d4f5027539e097fc9bd66d9",
    "signature": "0x1e963e3104f528f3415eb1de7b137871ac63aef8db20e2b40f104d225e48be0a199d54ba21f32222059786a15626be5b3284163fe65fcf75d0667d12ce32cfe81b",
    "signer": "0x0a5148A3f132E6696c1Cd3FDA8465fC5fF17d3D2",
    "userId": "803288761"
  }
}