{
  "manageEntity": {
    "action": "Save",
    "entityId": "1608407387",
    "entityType": "Track",
    "nonce": "0xae950cb95ecd14669ce78828d5105da538c197a68a8903a850d398d6a36f1690",
    "signature": "0xf91ad34694de2f09ec0e98b95dec0315bc4c99bd181ca51eae9e8672f467ddf716b3e9f1a784e7773c34f35f3c94cef0d20fa37cfa668a013ae29e529aca27641b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}