{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121644",
    "entityType": "Track",
    "nonce": "0x788e0f2016f0d7a318499bec1ffa2e4f4b0416becc9f46fc5792aa816da3624c",
    "signature": "0xd2cf86e611a6c2c22b7de456f12644ee28671dd1a65d8d80d518e662143535265c7e93b6d06531e064cfa01d8b837d692e02e58e7201f5afa0310ed2a0f5239b1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}