{
  "manageEntity": {
    "action": "Save",
    "entityId": "1614454125",
    "entityType": "Track",
    "nonce": "0x3106df9932aea2ec4631a8adc4b864951e536f9d230f16ce1bf598dc7bb5d599",
    "signature": "0x0a6ee912642bd1c10a2366756558d2a1ad9f0a2e9cc41495f13ee370fb78ea130efde3742cc5d51390b60bbf0b8490a7a713e492acad06c0d15944509778cabf1b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}