{
  "manageEntity": {
    "action": "Save",
    "entityId": "992238684",
    "entityType": "Track",
    "nonce": "0x290a59cb8c2498cf249fdb281b38146d9eda1a3dda4dd362814392270b72daa9",
    "signature": "0xcb033d9d0e6f86e8b0e9b961857086c68f090b345e8016b0da83f2942c3ef38e3bddf92074edc698ebe9a060996cde18605858281bed30d8af26bd7e9ebf37271c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}