{
  "manageEntity": {
    "action": "Save",
    "entityId": "1580261329",
    "entityType": "Track",
    "nonce": "1787805547030961695",
    "signature": "0x089e1c87e20ecf7aa2d224fd0d17882a28cd1925f66bcbda64dbc692fcd68ea433455e90a02c5b7201f79ffab475fa487dbd7d95e17492d3ae3e74e09b8bcaef1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}