{
  "manageEntity": {
    "action": "Save",
    "entityId": "1703551439",
    "entityType": "Track",
    "nonce": "0xdcd85862678433a45e4f5bf391bf426cf4c7ae1211daee25a08aeb32065b5555",
    "signature": "0x86d27936bccfb8e57aefbb669d72eae233e2cd0ef4428a34e04dcbf9456ffa4d6c175de78b47a417af23f942072a11d2ca89b069e3bb8cfc9b75c5eb6af2b59a1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}