{
  "manageEntity": {
    "action": "Save",
    "entityId": "1854944736",
    "entityType": "Track",
    "nonce": "0x4406a0206c91083cf2955e599472dd5fcfd670ccb820abd8bdbe808ab927aaaa",
    "signature": "0xa4f92275a7b041bad19644a1b980826d874adb5e2cbbd7b002d5c22fe6f7f97e68521f3b8b1d809d3fe68806b5179b174711028353d8cba9958264cf49a9dc7a1b",
    "signer": "0x934E45BE36e38037811AEb6F8eD448164c45408B",
    "userId": "582278090"
  }
}