{
  "manageEntity": {
    "action": "Save",
    "entityId": "1755875049",
    "entityType": "Track",
    "nonce": "0xcdd62eb1a2303b8c038aa84cfb6cd81a489e5d192c1823c75a5de768c27d7419",
    "signature": "0xc64f1531e77bea97ef3d57c089ac75d3c414af5dae1c57e177c8b3aa0204813d4726019590a7a381bc61ca7ba9a58e2ce759dc431e406e05e0a5001a60d0ea891c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}