{
  "manageEntity": {
    "action": "Save",
    "entityId": "21735",
    "entityType": "Track",
    "nonce": "0xa67891a2540e99d7c293e79a3ca72db32319c64796fc6aaf8130340abe7b47a2",
    "signature": "0x1a4a17c8464ef4a842d5ef918b57c28a975cb010fe1f7137cb387e05562f8abe58d0b8d40bfd28fd6703f8cd76649f601b2cf7cb70557c8af8329221c001a4e91b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}