{
  "manageEntity": {
    "action": "Save",
    "entityId": "2042581905",
    "entityType": "Track",
    "nonce": "0xae1c233416235b165aabfaaa9859761335fd640cfd488efa294a7b49d09aae15",
    "signature": "0xc9e733a1de6e5d4d83828246ba893bf84746754f4f73a20ed9dd20e3ce4f0e6c2577c162d64c050175ac153811a39fcae4edaee05440f2588e4fb000dd719e601b",
    "signer": "0x0a5148A3f132E6696c1Cd3FDA8465fC5fF17d3D2",
    "userId": "803288761"
  }
}