{
  "manageEntity": {
    "action": "Save",
    "entityId": "965780",
    "entityType": "Track",
    "nonce": "0xab471586edaa528ad336dc1bfd30a7d91530d1102361ebf0c5a15d25199ff0d0",
    "signature": "0x6ce9d7a06ee43e05790a2d3ba422d7c2771d115ca21a0c294d2a4b0dc256e83453ceb888ca9fa715fd2a41f0ee9190996e9c68e65f9fe3ac12f466c9fa1e74631c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}