{
  "manageEntity": {
    "action": "Save",
    "entityId": "309214354",
    "entityType": "Track",
    "nonce": "0x39b77dbdd082c5fe05380d59e527d0acf76972357e2f5372a3b23a8e9f60044a",
    "signature": "0x7b72c55fa54baed4373dcf4c4aa7c3f59de2f8d90ba564b52fea444d4576e9dc682586816a7e8e4c99833c82e90533698cbb6eb88d1a2a062cfb9f60e4d864801c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "103994"
  }
}