{
  "manageEntity": {
    "action": "Save",
    "entityId": "540750994",
    "entityType": "Track",
    "nonce": "0xa5f095501c99a1897d4f281a470daf545fba7b33747b1a71e7db5478d729aeb5",
    "signature": "0x803e27ad92cd6cda20e03385c35987e6a08cf4a016ef6cd3dc855e237b21f0b5472c6dae7d46b70ebd6f1d12e62c565698d868546f0d4473af36d78ded121dae1c",
    "signer": "0x868cDCaCaad507eE1eFBbDc02862A479cA5e1433",
    "userId": "614649001"
  }
}