{
  "manageEntity": {
    "action": "Save",
    "entityId": "2066886077",
    "entityType": "Track",
    "nonce": "0x173bf86054033ea574791cb413a54146da3c560f1ec3a57a90603ba55d32e356",
    "signature": "0x901a394e4cbf9da0053b53fdea11a2a3c1bbcb2d24a99b00a3a0f0abba5d40ba7c83e41a2b62a676e5af3e233d7c6677e7e32bf6f83d1015faf1077f654f72cb1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}