{
  "manageEntity": {
    "action": "Save",
    "entityId": "705765",
    "entityType": "Track",
    "nonce": "0x7186800ff387eb4aa7e88bec81d9706855d83c92ffe731b169050cebd1e5a10f",
    "signature": "0xdd54aa8486de7d2282212275bb533c2e42a0f298531a69aeccd490b120bbe1022f118459061ddfca1aa37d6582c55cc6eb24f9efff5e177789377452688867901c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}