{
  "manageEntity": {
    "action": "Save",
    "entityId": "575649234",
    "entityType": "Track",
    "nonce": "1791840072434516821",
    "signature": "0xffff8d46beefe2cc7d0e2e9b03fd347f535874b9c6c2a0f38d6136459b6a9d124fa987f6f72c2e40992c9f0fc4b422834bdc22ede7c30ebcf560c9a37180adab1b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}