{
  "manageEntity": {
    "action": "Save",
    "entityId": "1703338530",
    "entityType": "Track",
    "nonce": "0xdf99312ff5f9951725b58faebacce4ccde3d3af61f8661ba4368e97d1204389f",
    "signature": "0xaa5f783d457157c0109234aa5dada257fe91280034bc079bb4022fd4b7dc81ee6bbce40361c3426f621ad4e35c2e1c1b485dbd43473487146c35b471532ff0401c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}