{
  "manageEntity": {
    "action": "Save",
    "entityId": "1556552220",
    "entityType": "Track",
    "nonce": "0x25e31ae0c54e3e8e50c16bf921e15d49b8cd4b9badfc99f26f462abf7f18dd8e",
    "signature": "0x6461304ceb66edda284817df791bde8ce164afdc73a6c12e9dd2004de80c28a251b10a68f32f90a8f007fb8266b7229df457ece98de380fbf4792890f00c8d811c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}