{
  "manageEntity": {
    "action": "Save",
    "entityId": "1627994557",
    "entityType": "Track",
    "nonce": "0xd626d0bcf7bb92d81a963807023aec666bb3e6d24d60d631e1cf9cb7b992c562",
    "signature": "0x7509466feab4307a96f029bf8938cad0380af27f0819bcca9b505ae68e18f61f35f373423ee31208a562f826cfa7367edc5692a6357fdd16863533a1f03639621b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}