{
  "manageEntity": {
    "action": "Save",
    "entityId": "1018135",
    "entityType": "Track",
    "nonce": "0x9c3889e6df34691a0ad533f1d122a24e57788d37fe77dec71ead644bc5151281",
    "signature": "0x14df59da7bdd3ad941bb2d211a28ac253b1ffb603a664d78c4dd77ee6a52ca71494b924370b88c9ea447b81d8e48eba00b0122524d13e50482be9ea5dc49e3521c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}