{
  "manageEntity": {
    "action": "Save",
    "entityId": "1356013301",
    "entityType": "Track",
    "nonce": "0x14db84576c1c0a8983bc209067be7d3fc1b2b36e8ad4ceb4da41c8ec8375d0c2",
    "signature": "0xde1bff38ab0f390e95d6d9302da29e1af6fae6af86efc5940d097bdd03441d854386f3389040a38f6281d09e4d85fe39546a238ac934940d31101d6df5b3ccda1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}