{
  "manageEntity": {
    "action": "Save",
    "entityId": "329911",
    "entityType": "Track",
    "nonce": "0x361a7a7a758e00975605ef4d9d446835801d62f09846d920a0ab6d67d2617b4f",
    "signature": "0x94407ebc930add2d165b1ef9f274e98c9b45788723abacf78b10fab7caee122b416189e60ef196b474cd2b8eeabad803195445296bd793692cbbcd7f99022d9a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}