{
  "manageEntity": {
    "action": "Save",
    "entityId": "2054508629",
    "entityType": "Track",
    "nonce": "0x16de0e3bcc97d145c6ffb4510c3d9aba6dd0531b21ccb79863169d2d3e02f903",
    "signature": "0xc9f7565aa83b7f4c879a9d87fd035f3e41d11d9597975f2eae5d1153d13ef09d753f7174a466160555092f14602e582783e584ff7905b0eedf3d6c09dbd2db841c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}