{
  "manageEntity": {
    "action": "Save",
    "entityId": "522977187",
    "entityType": "Track",
    "nonce": "0x52924d67f1d002308888c987d0a904f8751bbb47c1ee374b58bc449167747de9",
    "signature": "0x7bd5c691fbbf2ce179233ccc1ef43d87678697cf8969a833f8b741e73352d762345b82cd4f7546643354b295d3a942093a3b80dbe0573d0bd6a24ddc113560c71b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}