{
  "manageEntity": {
    "action": "Save",
    "entityId": "679468320",
    "entityType": "Track",
    "nonce": "0xf625d6f91f4de1b0d13975ca0a222ff167d701ad6d82c8089f33fd192fee3afc",
    "signature": "0x6973c1c88375691b8b686c7f8d93f25f89f6f31b22403d7cffd156b3200eaecc19e28b2aa811131033348aa0ce10f266842aca63d9c71d994f0232d838faba7b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}