{
  "manageEntity": {
    "action": "Save",
    "entityId": "1730675475",
    "entityType": "Track",
    "nonce": "0x0f4914bb4adb919e093550a151ef18105367153ca851a1e628d90bfaf7ce8d90",
    "signature": "0xdd83571f6a4682eba24706ead2d4be24826d4fdff137b0223da8a1130008f86b5a151a4549a7fdac4bb7dfbc33f7eb35679476e8bd2620a67c046af82055292f1c",
    "signer": "0x917884dff3FC14B6ff795F32A8ad465D96698f81",
    "userId": "251507262"
  }
}