{
  "manageEntity": {
    "action": "Save",
    "entityId": "1299258417",
    "entityType": "Track",
    "nonce": "0x70dd8a7cba4a4ff013b327d8bca90c0274b22d7991ed5600547f63a5fbbbdab5",
    "signature": "0x6f6320c9d2f002b361d0854d92bc28fd133b09c9214446a63f8656187bbc0a486f92f13b24a94702a695085eebda4d97d56c73732b258b9f42e91abec0dd39d71c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}