{
  "manageEntity": {
    "action": "Save",
    "entityId": "570373296",
    "entityType": "Track",
    "nonce": "1792425021818678521",
    "signature": "0x73199101160c1a06f1b7874e4703212283c5cb3f739206f982dabe1cb0c0e245306ffca4b26f2337543c95d4ef86be6274cc210abcc6380ee1978b3f6a9a85571b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}