{
  "manageEntity": {
    "action": "Save",
    "entityId": "1883463883",
    "entityType": "Track",
    "nonce": "0xbc221678a74e5b4fb05479c58ed9f373ab4eb27d835f25d5df25acacf89dbe27",
    "signature": "0x30582976306b6f292cff6cc686c1ee5c6af625c35db202753e097d7b6c6489c33d343dbec570afc9e7999431c72085adff3af8f407b48ba27d963f89281281721c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}