{
  "manageEntity": {
    "action": "Save",
    "entityId": "690943",
    "entityType": "Track",
    "nonce": "0xab4f155730b2a21be519349744831284cbd5f4036be828dd2ecd59e852eb3b10",
    "signature": "0x78fd7068af3b4b43ff364b66ab82174b3fe3faa07737b0ce2e822fe15b06ded510e68503b9d3cd6c2bff383aaa99a379db6a2acf55eb04910dac94139b316a801c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}