{
  "manageEntity": {
    "action": "Save",
    "entityId": "19297179",
    "entityType": "Track",
    "nonce": "0x89acbd66a969075d60a8cabb0c778cf5e522a5845ac7fbd4afba18f7c9f07f9e",
    "signature": "0xa2cc5911265b513dbb84eef49e18a208888c26a8b749b18e44acabac585c882e5c1e66ce982b5c4f759db119e32d2c541398aaba9c21fa55e71b6e1572d63dac1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}