{
  "manageEntity": {
    "action": "Save",
    "entityId": "1124516",
    "entityType": "Track",
    "nonce": "0x88a4f6d64f5ba8d5995a5164a34894d3051bcfd9119d2039d8b3ae93c0d10338",
    "signature": "0x93a7a87e420986adae81c09be8011240fcbf73aa827d7ddd679b83d3505929fa1e9080ce9f82f9c897249ab3792542040fa7f01a07251f606dd543fcae0796421c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}