{
  "manageEntity": {
    "action": "Save",
    "entityId": "1869686833",
    "entityType": "Track",
    "nonce": "0xd66d8798e9e4873f3f8cce9fabbfcec3d84e980c7481d79354d1bba26fdc4c2b",
    "signature": "0xd281aa27f89c4e1bd5ec9bb66d81cb93df3c83d5bb3d6db4d2a06c3f0c0330c255c20351a53b1cc636ec80167c965ace28bd74b9bdeff76153c2273448aa65761b",
    "signer": "0x849b8180f084363b37768C823c174C9786020A66",
    "userId": "817339612"
  }
}