{
  "manageEntity": {
    "action": "Save",
    "entityId": "1736752629",
    "entityType": "Track",
    "nonce": "0x74587ff71cbf9f0063c4bd08035f2c073202301f632f2f7860325384bb8c09e9",
    "signature": "0x2f89fb20ce025225f729355948a1330a6001b94e8ac0541237be1345ad5580951c2c4682e167dd010674850aed42d8ed854be4ff738347439b3b9ccf72e420321b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}