{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834251494",
    "entityType": "Track",
    "nonce": "0xb5e13e03bcf9182a4b9229f3f8339b88cfa9213b1c4805d037ca4f9c13044eaa",
    "signature": "0x4b8e364d261afc89de2d650cda09881f721ac058c423cab1c7176a258c9846997cfdae83e128eff83d3abe1bbd51c500bc07117ebff887c376ff4878e18357ff1b",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}