{
  "manageEntity": {
    "action": "Save",
    "entityId": "1537109651",
    "entityType": "Track",
    "nonce": "0xcf34fa47a6ce9ffbd139f769cbf208b038a6604b8f4120a713d8da0158854626",
    "signature": "0x5d618f98e0bc9be69b86d04fff0c703a743064bfe59337d8b7f8c2928c93fb991e2b043aa7f5f9653a1793caa46659059a74a1f8a3ae84758bdd5d038c4130931c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}