{
  "manageEntity": {
    "action": "Save",
    "entityId": "1116822",
    "entityType": "Track",
    "nonce": "0xc21a610df0eba63bb9388a85aa8c188c044b2a09fdedb64ea8a60276c6a59c44",
    "signature": "0x76f8e3c3aadc4cb2fafb02f4cb18c737de35e0f6a7e359566c2cbe3f6236ef52630e9fa687a291b3294f5d7e3bb57dd9c1ea16f12f8c84bd555ec6a417cf87961b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}