{
  "manageEntity": {
    "action": "Save",
    "entityId": "1704170516",
    "entityType": "Track",
    "nonce": "0x2c7e82649097b2c47c9ff3423ffc5a2451c043f811820ea2c1662acc52001642",
    "signature": "0x863e701828ac43bea48c216fe71ba9e89b9434b8a24557d0583f50df941d6a9e5f8ff7cdb3f056b03c045c2406f03156c44881280f0dfff7ab3f8bf6212b4bc21c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}