{
  "manageEntity": {
    "action": "Save",
    "entityId": "1703551439",
    "entityType": "Track",
    "nonce": "0x62bd76c3052d526e5a3ae70e3393547875bf69ae22d4f7257820f00768165aa8",
    "signature": "0xfa579ced52424df3ddfaed410be88d5ffcfbdc2c2d5be0af1c6fe335ae7ca0c75641de89267a2117b6bd68a9e0247d53bb9d0233432b6670116e49cfb1d5a59b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}