{
  "manageEntity": {
    "action": "Save",
    "entityId": "349522266",
    "entityType": "Track",
    "nonce": "0x4a5ffdb4ce1654e1add69e150c4f8d44630e86eba044b9865220a4252061bb79",
    "signature": "0x824d9d9808d7836617c516f09648c1484bc20c9fb650ffaaa4a35f34d7894e4e64d9908c2e72ae5344f9248de8f890f0ea550faee638b69bf0bea54cc05bd80e1c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}