{
  "manageEntity": {
    "action": "Save",
    "entityId": "1672813958",
    "entityType": "Track",
    "nonce": "0xfed7a3f45f1060ada7da7e234b52702536a15526c525b40b207833bd7ecc54bb",
    "signature": "0x58510cb662b0db4c1389c1875756e78fe134a25fc1171a80f1007298f18db1da16c15a7fb0c71d94637afd87086f61b9b0f1e3c616cb7c9021fc9a9046b0dc041c",
    "signer": "0xc732abD40749026D35a8f4162a803dAAf665371e",
    "userId": "496394700"
  }
}