{
  "manageEntity": {
    "action": "Save",
    "entityId": "1229025699",
    "entityType": "Track",
    "nonce": "0x927b1228e29ff2d432fbc8badf2c527a66d643d1540380f98e452406a403ff5e",
    "signature": "0x927532799c94da535c9776cce95a4a21391dd9f182aa8ff14cac2d3a45751fe01453f3c298250a79636e028abdfe763f9bb02729a26574031d3802a34761294e1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}