{
  "manageEntity": {
    "action": "Save",
    "entityId": "1029951023",
    "entityType": "Track",
    "nonce": "0x2ec3dcbff2f35eec1fe326824869250faa656ed0d84e2001dbc2757db1f5255a",
    "signature": "0xe754423a373096c6993af4cc2aaa23703eaa8cbef16587ad39c68d2f71566d6110bd5d0807078f74d00921623c3cd73113d96fb84dc2d141f69706ebcdb7b5bb1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}