{
  "manageEntity": {
    "action": "Save",
    "entityId": "733881031",
    "entityType": "Track",
    "nonce": "0x2714fa8b8a8e9be31c2f4e9710726e4d136c1a86b814733ceb20617eadcb5f87",
    "signature": "0xe557816fcef74fc03b340321279a4ee5df2e9643c6f3d5337b5cb561c5c6594865a6613467caa2e01e3bfffda38321440224d719f242fa851a090512060db5d21b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}