{
  "manageEntity": {
    "action": "Save",
    "entityId": "325598",
    "entityType": "Track",
    "nonce": "0x8f4d29d514157262f59843765ec3e4e5f69d675c1ccc645f577dce7f91dc8a0a",
    "signature": "0x92c69f49c85e457ffc57a0df9766d752665f6567c1629dbebcfc88b7bd08d2e20658bee93528cc230996dfb6fde4dd842098c9b8d2fbff41f2356bcfba27ad4d1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}