{
  "manageEntity": {
    "action": "Save",
    "entityId": "1376865688",
    "entityType": "Track",
    "nonce": "0xc296897340baa38f809b313403e830a539080dbb0810074c65b4ed03483caa80",
    "signature": "0x9719ae56de4bce19bef3ebe734e6c894f182c127fb64e9b0352b45d603345d8c5abb6c8b9a293980d93738f20601f0688a73fc9bde2799fbb0fe7e91d4a950e41b",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}