{
  "manageEntity": {
    "action": "Save",
    "entityId": "1496052814",
    "entityType": "Track",
    "nonce": "0x27a8ede3bc8a400ebb658625f3bc3ba8353fd7d7f379788005477180b71ab99e",
    "signature": "0x4620a6bbfb4985fdb2834f3b7d7dc43b9fc1c2d489f007b74c5d99ae05aa37c10efd9d3d5ba836b44eebd199e77351853471debb024d286935e77f8d0f32e4d91c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}