{
  "manageEntity": {
    "action": "Save",
    "entityId": "1317943788",
    "entityType": "Track",
    "nonce": "1790151005373206755",
    "signature": "0x4dc9daf47c239df4528786e0386a20f08e17e9f5fef00e6157da2da9c6641cab3b525830fd6117d9ac82bb583cf6e3ce2bd604c399bbe1f68f3aa556036f91cd1c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}