{
  "manageEntity": {
    "action": "Save",
    "entityId": "2138109196",
    "entityType": "Track",
    "nonce": "0xc14ab87b879a5e71100f314d52dd376bc965778398f4043781ccd5d0d3bdc612",
    "signature": "0x397a41c65deabe6b68331540867b2c833018af5209eadc6173b91b2ff73a3791594ee32ee9fd7ccd432af86593615e7545085df90a0b55cd36b5b084e27c67cb1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}