{
  "manageEntity": {
    "action": "Save",
    "entityId": "1145743184",
    "entityType": "Track",
    "nonce": "0x69024b70820668f9e10267ae78851b960906ccf5069048752c9c6f44db969ded",
    "signature": "0xcb2e7e3efccdae87f2441126891e15c0355c373694be69457bb95815babec93e47294b90c2d7426c4fe449bc65e66498aeb863ac755dfaf74cfaf5951ef730b61b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}