{
  "manageEntity": {
    "action": "Save",
    "entityId": "1267883289",
    "entityType": "Track",
    "nonce": "0x27be4f293110ab7f3fce900d1bb13fc2113a05f5bffb1185824ffa4f5654316c",
    "signature": "0xdd105fafa064930cf88dbf8fffb045a0daa63c909ea1c80726cea7f42d9fc1373192854266cd4d6f9cfc53881b3c027caf668219ff31c99f85e5b3f4a63e0c1d1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}