{
  "manageEntity": {
    "action": "Save",
    "entityId": "1041372745",
    "entityType": "Track",
    "nonce": "1785604162144478575",
    "signature": "0x901b194db318b038cba82d9623c4a0b6a6de1360d3fa1b8bff0f7736c7c63db422a35a7b6b321e520fe2009b29c2ae18274ccd061d006107dd0a95e1e780ea9b1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}