{
  "manageEntity": {
    "action": "Save",
    "entityId": "391232",
    "entityType": "Track",
    "nonce": "0x15020678424bd9af2bec0b16f840b60293775075643c476edd383620d7b2d0ca",
    "signature": "0x6f7838e39a35d6bfaf1b2203dc932f94fe8860a0e90b32f92063b59c51ccd15a052d959bc0452efbef6898cb4bc1cd1831a37fad7a21dbe26942cd37318938111c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}