{
  "manageEntity": {
    "action": "Save",
    "entityId": "126757",
    "entityType": "Track",
    "nonce": "0xb7835ebf93edfa371ecb1c1a7dc537913b19ce75638c7c61ed8476d15686e066",
    "signature": "0xb4edb900eb7a8935bfc91bb2360fc61e1e4fe4973aa454cb80405f4954d0b0e96b9b96a48f44bec15ec5f5ceaccd799fd7fd88c3b59efce2b3eb5e01fe23bc3e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}