{
  "manageEntity": {
    "action": "Save",
    "entityId": "957569370",
    "entityType": "Track",
    "nonce": "0x9e60f0ef39d7fe1b8d9f7d6f91bce282ca12abd615fe9e6fff82f4cab241b54a",
    "signature": "0xeecb3d16c107bd56771e96e208868d9bcd4dea73aeb171f95f5a318139405d2a1a39125db8a704897aa5ff7e6bd331c3c95bcd4fcb423d33d96835d4b95857c91b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}