{
  "manageEntity": {
    "action": "Save",
    "entityId": "1072732261",
    "entityType": "Track",
    "nonce": "0x1b33fb92b032f7c0bbe01bd0d0bca1cf1e5f5ee666b04cf31a2754cae36acd73",
    "signature": "0x44a1f39426db2d38ad0f32711a8ec712cb65a385d56e593086d4db7b896578c10fb053c83a87aa3ad4fe1c5ea5f07a582c5c804eb34a662b3b5dd4cccb024f171b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}