{
  "manageEntity": {
    "action": "Save",
    "entityId": "294023094",
    "entityType": "Track",
    "nonce": "0xcbbf0650ba21391f2befefbf4219d36f6da9b38281b8b0f83d20c6f2e336b0b8",
    "signature": "0xaf5041844a53ae62cc992885504f6e377023dc91db9cbba03cdca64199b726e964984744077d54dc66c9f2a59f2f038c7f48b840d461c0ea691bc489f1d50f5e1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}