{
  "manageEntity": {
    "action": "Save",
    "entityId": "689113764",
    "entityType": "Track",
    "nonce": "0x84060c45deeaa0c9cab4a0e83aff8b64e1166aa66e3ebb7d08ed12d82edde2d0",
    "signature": "0x6e6f05fa56b810c7cc1aa1c14cf961bf32ed743d38c33154438f943628b0d3ab260eb7d12192dca4576520f1653929422be48370fdc5f85069217da9e479d5381b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}