{
  "manageEntity": {
    "action": "Save",
    "entityId": "2145839425",
    "entityType": "Track",
    "nonce": "0x160adc47a8832829404b7a728db3428ba7bb71033a98725fbf5790e78e44981f",
    "signature": "0xc5156476a2e86c7a245a5af00a9ae00d88df1561bba0e57c479159b6a1e7709709799cb059e53a5646d6013cee7c907002770a868dc9b9527b5f4489e44102e61c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}