{
  "manageEntity": {
    "action": "Save",
    "entityId": "1635326308",
    "entityType": "Track",
    "nonce": "0x2d1d2d7075bb3b6f7387d0d718d11e965aa81b7ecf010b2a8f64f694073cdad8",
    "signature": "0xdf3e5c8ee83f1dbdad796f2f434dab8201f9692cd2be06caa9a768c714b0cea60ddccbb12b3a34f2e0c9ea91bc85bc7b323f2694bd908fd9d49607bd7e98789f1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}