{
  "manageEntity": {
    "action": "Save",
    "entityId": "35259894",
    "entityType": "Track",
    "nonce": "0x73628ed983606245f8770c232530bb78396e39d06e92b824c1e6e188178412f9",
    "signature": "0x489339a3d693a253cdbfd3416cc28b9060789febf88faa8a1e4a449e120b3249454a8bf6818f96be58eb4bc6de446daea3b20a9213130f550d3ea5b8063836c61b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}