{
  "manageEntity": {
    "action": "Save",
    "entityId": "1951837264",
    "entityType": "Track",
    "nonce": "0x8f2d293a7ee51460028118824011919f63a15cee04a2ac6d998669d96e1b5e72",
    "signature": "0xa885f3ac28096d3c3412f661f5849c1d5aeefbc3706c8c212b9719b6b2ac00481dc0e6d7c3a24a4e827b8c9d03a74cd5e0f6588f8661c80c607317f5275854111c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}