{
  "manageEntity": {
    "action": "Save",
    "entityId": "1649008737",
    "entityType": "Track",
    "nonce": "0x4d3c7b1bbecd1c7726ce463abe3386a2178a99bca1e3f8c0dd67cf15771be6de",
    "signature": "0x9ba70e851deb976a61622f15ffd116b04a4e1de611eb181a4607c87cc667623550ecf6b2ed7f7f2951597186d640d42559b8d4bfab35f0b16ebdd9432406bd831c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}