{
  "manageEntity": {
    "action": "Save",
    "entityId": "546981486",
    "entityType": "Track",
    "nonce": "0x8d9976b8f202c216f2b5b23d60dfababcfed44ff4ef3964f25b750ac7b34e4d2",
    "signature": "0xcaf5f64693ef42a0a333488707007fd8dd80b5bbc79aaf65660761b3041d240239741f46c4b374685761156edec1563de7d493c2f07c60613b7fad1b2c3fd3ba1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}