{
  "manageEntity": {
    "action": "Save",
    "entityId": "353868",
    "entityType": "Track",
    "nonce": "0xae7e7a4b82d6ab41c3d521449325d58fa454c7a0c09df35f884833d887e7614e",
    "signature": "0x50161f1a547f62bb5985c41a5c00f6ada3cb1a02714d578a5bfd074836b119302215ea059f367c84a5c54ce5a1beb283aa792134006522dee47eccc8130fde971b",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}