{
  "manageEntity": {
    "action": "Save",
    "entityId": "1107921629",
    "entityType": "Track",
    "nonce": "0x374eeebd3f7053e66d19a346c08e7b01c504e3efb218721702d8644ee0fa110d",
    "signature": "0xb95345558c4ab90da250b889839085ce04309c6d768065412a03372fafd9a32803ce6fbd48f032d1636dc7608fda4cb5a00cfdded071e2606abecd50f4d7eeae1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}