{
  "manageEntity": {
    "action": "Save",
    "entityId": "1545275603",
    "entityType": "Track",
    "nonce": "0xf31c272197f697c61cb34cff4ceb5496f29a4f148c8700e4dab3687ec607accf",
    "signature": "0x50bec2257713c7c47ab86999184970a25b7431cc6de367897492460e21b125da2874f8eff58cf39e20d71581d784966d3866097cbab52b848023f2a6025294ea1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}