{
  "manageEntity": {
    "action": "Save",
    "entityId": "193077845",
    "entityType": "Track",
    "nonce": "0x484e4f7f7fe636f29a05f06cd8d5495e8b59751e46a06b292c61a8594005bb44",
    "signature": "0xa8bdc121fa035337c54071d0c61908a32bec21f47851a2746eb0edf10f68d7b32a0177472ec54c6f411c10f6e5bc03c3da1f567b1323119150ce24ebe51485481c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}